Manny observed a Northern Gannet, a deep diving seabird, hovering at a height of 10 meters above the ocean surface. The bird then dove into the water, diving to a depth of 16 meters before coming to the surface. The dive can be modeled by a quadratic function, y = x2 – 10.3x + 10, where x represents the time the dive lasted in seconds and y represents the height of the bird in meters. Use the graphing calculator to graph the equation. After how many seconds did the bird surface? Round your answer to the nearest tenth. seconds

Answer:

The best estimate is 100 per month

Step-by-step explanation:

Take 618 and divide by 6 to get the exact amount

We want an estimate

Round 618 to 600

600/6 = 100

Answer:

A

Step-by-step explanation:

It is $100

Answer:

answer is B 77

Step-by-step explanation:

got it right on edg 2020-2021

The nearest whole degree is 77

In mathematics, trigonometric functions are real functions that relate an angle of a right-angled triangle to ratios of two side lengths. The six trigonometric functions are Sine, Cosine, Tangent, Secant, Cosecant, and Cotangent.

Given here: ABC is a right angle triangle AC=9, BC=2 and AB=8.77

The formula for law of cosines is given by a²=b²+c²-2bcosA

                                                                      81=4+76.9129-2×2cos A

                                                                      0.0871=-4Cos A

                                                                        cos A=-0.21775

                                                                                A=77.43208

Hence, The nearest whole degree is 77

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The value of x in the given question is: x = y/5

How to change the subject of the formula?

We are given that the function for getting y is:

y = 5x

Now, to make x the subject of the formula, we will use division property of equality to divide both sides by 5 to get:

y/5 = 5x/5

x = y/5

Thus, the value of x in the given question is:

x = y/5

Answer:

-16x^4 - 12x^3 + 70x² + 54x + 9

Step-by-step explanation:

(-2x² + 9)(8x² + 6x + 1)

-16x^4 - 12x^3 -2x² + 72x² + 54x + 9

-16x^4 - 12x^3 + 70x² + 54x + 9

I am pretty sure that this is the answer.

Tell me if I am wrong.

Can I get brainliest

Sorry, It wont let me put my answer.

Answer: its b. i suck at explaining so sorry lol but its b

Answer:

15,236 sq in

Step-by-step explanation:

First, you have to split the net into three rectangles and two triangles

step 1

triangular base area

1/2 bh = 1/2 (44 in)(64 in)

= 1/2 (2,816 sq in)

= 1,408 sq in.

2 x 1,408 sq in = 2,816 sq in.

step 2

end rectangle area

lw = (68 in)(69 in)

= 4,692 sq in

2 x 4,692 sq in = 9,384 sq in

Now find the area of the middle rectangle

lw - (69 in) (44 in) = 3,039 sq in.

then add all the areas together

2,816 + 9,384 + 3,036 = 15,236 sq in

Hope this helps :)

Answer:

-64

Step-by-step explanation:

Answer:

[tex]-64=64cos(\pi )+64i/ sin(\pi )[/tex]

Step-by-step explanation:

For a complex number a + bi, polar form is given by [tex]r(cos(0)+ i sin(0))[/tex], where [tex]r = \sqrt{a^2+b^2}[/tex] and [tex]a = atan(\frac{b}{a} )[/tex]

In this case, we have [tex]a = -64[/tex] and [tex]b=0[/tex]

Therefore, [tex]r = \sqrt{(-64)^2+(0)^2} =64[/tex]

Also, [tex]0 = atan(\frac{0}{-64} )+\pi =\pi[/tex]

Which means that, [tex]-64=64cos(\pi )+64i/ sin(\pi )[/tex]!!!

I'm happy i finally got it!

Answer:

x = 7+√(3), 7-√(3)

Step-by-step explanation:

x^2 - 14x + ___ = -46 + ___

x^2 - 14x + 49 = -46 + 49

(x-7)^2 = 3

√(3) = x-7

x = 7+√(3), 7-√(3)

The value of x is x = 7+√(3), 7-√(3)

Completing the square means writing a quadratic in the form of a squared bracket and adding a constant if necessary.

Given:

x² - 14x ++46 = 0

x² - 14x ++46 + 7²- 7² = 0

x² - 14x + 7² +46 - 49 = 0

(x- 7)² - 3=0

(x- 7)² = 3

x = 7+√(3), 7-√(3)

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Answer:

6%

Percentage of teachers = 6%

Step-by-step explanation:

Given;

Number of grade k-2 students = 137

Number of grade 3-5 students = 145

Total = 300

Number of teachers = 300 - (137+145) = 18

Percentage of teachers = (number of teachers÷total)× 100%

%T = (18/300) × 100

%T = 6%

Answer:

12.5%

Step-by-step explanation:

Answer:

[tex]\frac{1}{8}[/tex].

Step-by-step explanation:

To solve this, we will first need to think about the probability of getting "tails". A coin has two sides, meaning landing on "tails" would result in a probability of [tex]\frac{1}{2}[/tex] per toss.

In the question, a total of 3 tosses is given. This means we will need to multiply the probability 3 times:

[tex]\frac{1}{2}[/tex] ×[tex]\frac{1}{2}[/tex] ×[tex]\frac{1}{2}[/tex] = [tex]\frac{1}{8}[/tex] .

Answer:

9 hours of work

Step-by-step explanation:

306/17 = 18 per hour

so 162/18 = 9

Answer:

9 hours

Step-by-step explanation:

We can make a proportion and solve

She makes $306 for 17 hours of work,and she makes $162 for x hours of work

306/17=162/x

Cross multiply

306*x=17*162

306x=2754

Now we need to solve for x, by getting x by itself. x is being multiplied by 306; to undo this, divide both sides by 306

306x/306=2754/306

x=9

So, she needs to work 9 hours to make $162

Final answer:

By dividing the total cost of 5 fruit bars by 5, we get the cost per bar, which is $0.79. Then, dividing $12 by $0.79 per bar, we find that you can buy 15 bars with $12.

Explanation:

To determine how many frozen fruit bars can be purchased with $12 when 5 bars cost $3.95, we first need to calculate the cost per bar. We do this by dividing the total cost of 5 bars ($3.95) by the number of bars (5), giving us:

Cost per bar = $3.95 ÷ 5 = $0.79 per bar.

Next, we divide the total amount of money available ($12) by the cost per bar to find out how many bars can be bought:

Number of bars = $12 ÷ $0.79 per bar

When we do the calculation, we get:

Number of bars = 15.19 bars

Since we can't buy a fraction of a bar, we round down to the nearest whole number:

Number of bars that can be bought = 15 bars

Therefore, with $12, you can buy 15 frozen fruit bars.

Answer:

4.45

Step-by-step explanation:

Answer:

4.04

Step-by-step explanation:

6.35/ 1.57= 4.044585987261146‬

round to nearest hundredth is where the 4 is located at so its 4.04

Answer:

-12

(someone check)

Answer: -12

Step-by-step explanation:

|-16|=16, (-2)^2=4, 4^2=16

So, (16÷4) -16 = -12

1. On Monday, about 86 letters were delivered incorrectly out of 430.

2. On Tuesday, approximately 625 letters were delivered in total.

1. For Monday:

Given an 80% chance of delivering correctly, the expected number of letters delivered incorrectly is 20% of 430:

[tex]\[ 0.20 \times 430 = 86 \text{ letters} \][/tex]

2. For Tuesday:

If 500 letters were delivered correctly, it means 100% - 80% = 20% were delivered incorrectly. So, the total number of letters delivered is:

[tex]\[ \frac{100}{80} \times 500 = 625 \text{ letters} \][/tex]

Complete Question:

Answer: $585

Step-by-step explanation:

Find the area of the trapezoid (Area: 117 sq ft)

Multiply the area by 5 because each square feet is $5

And vola your answer!

Answer:

2.3+r=7.1

move all terms to the left:

2.3+r-(7.1)=0

add all the numbers together, and all the variables

r-4.8=0

move all terms containing r to the left, all other terms to the right

r=4.8 is the answer

Answer:

r = 4.8

Step-by-step explanation:

2.3 + r = 7.1

r + 2.3 = 7.1

r = 7.1 - 2.3

r = 4.8

Answer:

y = -8/7x +4

Step-by-step explanation:

7/4y=-(2x-7)

Distribute the minus sign

7/4y=-2x+7

Multiply each side by 4/7

4/7*7/4y=4/7*-2x+7*4/7

y = -8/7x +4

Answer:

y = -8/7x + 4

Step-by-step explanation:

1) First remove the parentheses

7/4 y = -2x + 7

2) Then multiply by 4 to get rid of the denominator

7y = -8x +28

3) Now divide by 7 on both sides, this way you'll isolate the y variable on the left side

y = -8/7x +4

ask me questions if u have any

The width of the yard is 6 meters, calculated using the Pythagorean theorem with one side as 8 meters and the other side as the unknown width.

We can use the Pythagorean theorem to solve this problem. The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.

In this case, the two sides of the triangle represent the length and width of the yard, and the hypotenuse represents the distance between the gopher's holes.

Let's denote the width of the yard as (w). According to the problem:

Length of the yard (L) = 8 meters

Distance between the gopher's holes (h) = 10 meters

Width of the yard ((w)) = ?

We can set up the following equation using the Pythagorean theorem:

[tex]\[ w^2 + 8^2 = 10^2 \][/tex]

[tex]\[ w^2 + 64 = 100 \][/tex]

[tex]\[ w^2 = 100 - 64 \][/tex]

[tex]\[ w^2 = 36 \][/tex]

[tex]\[ w = \sqrt{36} \][/tex]

[tex]\[ w = 6 \, \text{meters} \][/tex]

Therefore, the width of the yard is 6 meters.

Answer:

a) 1/2

Step-by-step explanation:

All we have to do is simply find the probability of selecting a triangle, find the  probability of selecting a circle and then add them together.

There are a total of 10 shapes in the box.

There are 3 triangles, so, the probability of picking a triangle is:

3/10

There are 2 circles, so, the probability of selecting a circle is:

2/10

Adding them together yields:

3/10 + 2/10 = 5/10 = 1/2

The probability of selecting a triangle or circle is 1/2.

Answer:

c

Step-by-step explanation:

Answer:

Step-by-step explanation:

This is a test of 2 population proportions. Let a and b be the subscript for people from region A and region B. The population proportions would be pa and pb

pa - pb = difference in the proportion of people from region A and region B.

The null hypothesis is

H0 : pa = pb

pa - pb = 0

The alternative hypothesis is

H1 : pa ≠ pb

pa - pb ≠ 0

it is a two-tailed test

Sample proportion = x/n

Where

x represents number of success

n represents number of samples

For region A,

xa = 16

na = 100

pa = 16/100 = 0.16

For region B,

xb = 24

nb = 100

pb = 24/100 = 0.24

The pooled proportion, pc is

pc = (xa + xb)/(na + nb)

pc = (16 + 24)/(100 + 100) = 0.2

1 - pc = 1 - 0.2 = 0.8

z = (pa - pb)/√pc(1 - pc)(1/na + 1/nb)

z = (0.16 - 0.24)/√(0.2)(0.8)(1/100 + 1/100) = - 0.08/√0.0002891223

z = - 1.41

Since it is a 2 tailed test, we would find the p value by doubling the area to the left of the z score to include the area to right.

Area to the left from the normal distribution table is

0.07927

P value = 0.07927 × 2 = 0.16

Since 0.05 < 0.16, we would accept the null hypothesis

Therefore, the data does not provide convincing statistical evidence that there is a difference between the two regions for the population proportions of people who shop online for groceries.

Final answer:

To determine if the differences in grocery shopping habits between two regions are statistically significant, a two-proportion z-test is conducted. We first state the null and alternative hypotheses, calculate the test statistic, find the p-value, and make a decision based on the significance level of 0.05.

Explanation:

To evaluate if there is a significant difference between the population proportions of people who shop online for groceries in two regions, we need to conduct a two-proportion z-test. The steps are as follows:

In this scenario, with 16% of 100 people from Region A and 24% of 100 people from Region B indicating they shop for groceries online, a two-proportion z-test will reveal if the observed difference is statistically significant at the 0.05 level.

Answer:140.3

Step-by-step explanation:

Answer:

140.3

Step-by-step explanation:

The ratio 3:3 signifies equality between two quantities and an equivalent ratio can be found by scaling both parts by the same number. Dividing both parts by 3 gives us the simplest form, which is 1:1.

A ratio compares two quantities and can be written in various forms such as fractions, with a colon, or with the word "to". The ratio 3:3 is an expression comparing two equal quantities. To find an equivalent ratio, we can simplify or scale the ratio by multiplying or dividing the numerator and denominator (the two parts of the ratio) by the same number.

In this case, dividing both parts of the ratio 3:3 by 3 gives us an equivalent ratio of 1:1, which also represents equality between two quantities. Multiplying both parts by a common number will also produce an equivalent ratio. For example, multiplying 3:3 by 2 gives us 6:6, which is still equivalent. It's essential to maintain the equality of the two parts when finding an equivalent ratio.

Ratios can be applied to various situations, including unit conversions, scale factors, proportions, and comparisons in scientific experiments, such as the ratio of amplitudes in a double-slit experiment in Physics.

Answer: 31%

Step-by-step explanation: We need to find the amount deducted from the check which is $101.15. Keep in mind that this is the amount DEDUCTED, so if we add it to the net pay we will get the full amount which is $330.

Now we can do some math.

101.5 x 100 / 300 = 30.6515152% or 31%

The percentage of gross income going to taxes and FICA will be 38.75%.

The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.

The percentage is given as,

Percentage (P) = [Final value - Initial value] / Initial value x 100

To the nearest one percent, the percentage of gross income going to taxes and FICA is: 44% 31% 69% 11%

P = [(0.44 + 0.31 + 0.69 + 0.11) / 4] x 100

P = (1.55 / 4) x 100

P = 0.3875 x 100

P = 38.75%

The percentage of gross income going to taxes and FICA will be 38.75%.

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Answer:

Data Set 2, seventh graders:

Center: The median value is 54. (Count to the middle: it's the tenth value.) The set is bimodal, with modes at 53 and 55. (The mode is the number that occurs most frequently.)

Shape: The set looks to be fairly symmetrical, though data lies closer to the right than the left.

Spread: The range is 60-50 = 10, so it's less spread out than the sixth graders.

Answer:

a=7.8

<C=84.8°

<B=44.19

Step-by-step explanation:

Answer:

Step-by-step explanation:

What it means to "solve for a triangle" is to basically find ALL the missing parts, which in this case, are the lengths.

You are given the angles of the triangle, which we can use to help find the lengths.

By using sin, cos, and tan we can find the missing lengths

** quick side note, an easy way to remember how to use sin, cos, tan is SOH CAH TOA. In other words "for sine, multiply the opposite and hypotenuse, for cosine, multiply adjacent and hyp., and for tan, multiply opposite and adj.

start w/ solving for an angle (it doesn't matter which one but ill do A)

Bc you aren't given any side lengths, you have it a little easier by having to only use one method of SOH CAH TOA to solve. The method is sine

Using your calculator, type in sin(degree) or sin(51), and  you should get

= 0.777145 OR 0.8

** make sure your calculator is is DEGREES not RADIANS

Now do this for the rest of the angles:

sin(7)= 0.1

sin(10)= 0.2

You have all the lengths (0.8, 0.1, 0.2) add them together to find the perimeter and if you want to find the area use Bh/2. But to find the area you must have a height, which you don't have

To find the height use formula: sqrt/( S(S-A)(S-B)(S-C)

A, B, C are the sides you've found using sine, and S is 1/2( A+B+C) or fast math is 0.55.

Plug in the values and solve :)

Answer:

Check the explanation

Step-by-step explanation:

Kindly check the attached image for the step by step explanation of the answer to the question

Answer:subtracting 8 from both sides

Step-by-step explanation:

Answer:

The answer is C, subtracting 8 from both sides

Step-by-step explanation:

The second answer is A, -8

assuming youre on edg