By rounding to 1 significant figure,estimate
6.4x7.35

Answer:

Step-by-step explanation:

Terms  

7

3d²

d⁴

Constant : 7

Coefficient of 3d²  = 3

Coefficient of d⁴ = 1

Final answer:

The expression 7 + 3d2 + d4 contains terms 7, 3d2, and d4, with coefficients 3 and 1 (implicit), and the constant 7. We identify each part according to algebraic principles and ensure to simplify and check our work.

Explanation:

The expression given is 7 + 3d2 + d4, which is a polynomial in d. The terms in this expression are 7, 3d2, and d4. Each part of a term can be classified as follows:

The coefficients are the numerical factors of the variables, which in this case are 3 for the term 3d2 and 1 for the term d4 (note: the coefficient is implicitly 1 here, since it's not written).

The constants are terms that do not contain variables, which here is only the number 7.

As a part of algebra, it's important to eliminate terms where possible to simplify the algebra and always check the answer to see if it is reasonable.

Final answer:

The best estimate for the frog population, calculated using the mark-recapture method where 30 frogs were initially tagged and later 12 tagged frogs were found in a sample of 520, is approximately 208 frogs.

Explanation:

The question involves estimating the total population of frogs in a wetland area based on a mark-recapture study. The calculation is based on a proportion set up by the initial number of tagged frogs to the total initial tagging, compared with the number of tagged frogs found in a later sample to the size of that sample. This is a classic example of a capture-recapture method used in ecology for estimating population sizes.

The initial number of tagged frogs is 30, and later, from a sample of 520 frogs, 12 are found to be tagged. To estimate the total population (N), we set up the proportion as follows:

30 tagged frogs / N total population = 12 tagged frogs / 520 sample size

Now we cross-multiply and solve for N:

30N = 12 × 520

N = (12 × 520) / 30

N = 6240 / 30

N = 208

Therefore, the best estimate for the total frog population is approximately 208 frogs, rounded to the nearest whole number.

Answer:

Using synthetic division suffices to answer your question:

Step-by-step explanation:

Synthetic division is the process by one reduces a large polynomial in your case [tex]x^3-7x-6[/tex] by a binomial in your case [tex](x+1)[/tex].

To do so one does the following:

[tex]\begin{array}{cccccc}-1|& 1&0&-7&-6\\ & &-1&1&6 \\& 1&-1&-6&0 \end{array}[/tex]

Since we divided by a linear binomial it reduces the power by one which produces the following quadratic:

[tex](x^2-x-6)[/tex]

Which can be factored in the following, and I will provide the complete factorization as well:

[tex]p(x)=(x+1)(x-3)(x+2)[/tex]

Answer:

38.5

Step-by-step explanation:

The perimeter is found by

P = 2( l+w)

We know the width is 23, we are looking for the length

P = 2 (23+l)

The perimeter is 123

123= 2 (23+l)

Divide each side by 2

123/2 = 23+l

61.5 = 23+l

Subtract 23 from each side

61.5 -23 = l

38.5 = l

The length of AB = 38.5

Answer:

-pi

Step-by-step explanation:

as x equals zero, g(x) = -3.14 = -pi

Your answer would be the second option, -π.

This is because as x approaches 0, cos(x + π) approaches cos(π) = -1. On top, x + π as x approaches 0 will tend to π, so you end up with π/-1. This simplifies to -π.

I hope this helps! Let me know if you have any questions :)

Answer:

A) 60

B)450

Step-by-step explanation:

A) you multiply 5x12

B)10,000(the whole) divided by 100(the 4.5% comes from 100%)is 100.Now instead of trying to divide the missing number,(you cant cause its not there) you instead multiply.You multiply 4.5% by the hundred that you got earlier.

Answer:

(6,7)

Step-by-step explanation:

The length of the new vector is [tex]\sqrt{85}[/tex], with side lengths 7 and 6. Therefore, the new coordinates are (6,7). Hope this helps!

9515 1404 393

Answer:

  <6, 7>

Step-by-step explanation:

The sum of two vectors is found by summing their corresponding components.

  a + b = <4, 1> + <2, 6> = <4+2, 1+6>

  a + b = <6, 7>

Answer:

=6/7x^3

Step-by-step explanation:

36x^4/42x^7

(36/42)(x^4/x^7)

6/7(x^-3)

6(x^-3)/7

6/7x^3

Answer:

to the nearest whole degree means that you look at the first decimal place. if it is less than 5, you keep the whole number and eliminate the decimal. if otherwise, the decimal is ≥5, you round up the whole number and eliminate the decimal.

Answer:

[tex]4x^6+12x^5+8x^4[/tex]

Step-by-step explanation:

To find the area of a triangle, you need to multiply the width by the height. In this case:

[tex](4x^3)(x^3+3x^2+2x)=\\4x^6+12x^5+8x^4[/tex]

Hope this helps!

Answer:

87.28 cubic inches

Step-by-step explanation:

Leigh wants to fill the conical candle wax mold completely with candle wax.

We have to calculate the volume of the cone by the formula :

[tex]V=\pi r^2\frac{h}{3}[/tex]

Here, V = volume

r = radius = 2.1 inches

h = height = 18.9 inches

By substituting these values given, into the formula

[tex]V=\pi (2.1)^2(\frac{18.9}{3})[/tex]

   = (27.783)π

   = 87.28 inch³

Conical mold can hold 87.28 inch³ candle wax.

Answer:

Step-by-step explanation:

Answer:

the answer is C: 90

Step-by-step explanation:

if its across from the number then its gonna be the same

Answer:

c: 90°

Step-by-step explanation: The lines are a reflection of each other, so the 90° angle is the same as B. :) sorry if my explanation is bad.

Answer:

[tex] area = 21.11 ~in.^2 [/tex]

Step-by-step explanation:

Area of sector of circle with central angle measuring n degrees and radius r:

[tex] area = \dfrac{n}{360^\circ}\pi r^2 [/tex]

[tex] area = \dfrac{80^\circ}{360^\circ} \times 3.14 \times (5.5~in)^2 [/tex]

[tex] area = \dfrac{80^\circ}{360^\circ} \times 3.14 \times (5.5~in)^2 [/tex]

[tex] area = 21.11 ~in.^2 [/tex]

The area of the sector of the circle will be 21.12 inch².

The area of sector of circle central angle θ in degree and radius r will be represented as

A= (θ/360°)πr²

the sector has a central angle θ=80°

r=5.5 inches

substituting these values in above formula for the area of the sector of circle,

Area= A

= (θ/360°)πr²

= (80°/360°)π(5.5)²

=21.12 inch²

Therefore, the area of the sector will be 21.12 inch².

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Answer:

If it is horizontal then it is zero, if it is vertical then it is undefined

Step-by-step explanation:

horizontal=  <------------->

             ^

vertical=|    (up and down)

             v

Answer:

undefined

Step-by-step explanation:

Answer:

Socrates' box is 48 sq inches larger than Plato's.

Step-by-step explanation:

14x8x6=672

12x12x5=720

happy to help ya :)

5 is correct

5/6 = 15/18

Answer:

(n -7)(4n + 8) = 0

Step-by-step explanation:

(a -b)² = a² - 2ab + b²

(2n - 5)² = 81

(2n)² - 2*2n*5 + 5² = 81

4n² - 20n + 25 = 81

4n² - 20n + 25 - 81 = 0

4n² - 20n - 56 = 0

4n² - 28n + 8n - 8*7 = 0

4n*(n -7) + 8*(n - 7) = 0

(n -7)(4n + 8) = 0

Answer:

Its easy !

Step-by-step explanation:

Test to determine if a function y=f(x) is even, odd or neither: Replace x with -x and compare the result to f(x). If f(-x) = f(x), the function is even. If f(-x) = - f(x), the function is odd.

Answer:

$25.50

Step-by-step explanation:

There three people- Audrey and two co-workers

Each pay $8.50

Then the total is:

Answer:

So starting with what we already know, £100 was paid in all, all 100 seats were taken. Adults pay £3.50, Children pay $0.85 and the Pensioners pay $1.00. I basicaly started off by trying it so all adults, children and pensioners are the exact same number. 33 adult tickets would cost them £115.50. Crossing that suggestion out; I tried again, but this time, with 3 adults, 50 children and the 47 that were left, i put as pensioners. So, now there is 100 people and this is kind of working out:

3 adults= £10.50, 50 children= £42.50, 47 pensioners= £47.00 Total £100

Step-by-step explanation:

As per the given data number of adults [tex]=3[/tex] , number of children [tex]= 50[/tex] and number of pensioner [tex]= 47[/tex].

" Number is defined as the count of the given quantity."

According to the question,

Total number of seats [tex]=100[/tex]

Total amount of full seats [tex]= \£100[/tex]

Price of adult ticket [tex]= \£ 3.50[/tex]

Price of children ticket [tex]= \£ .85[/tex]

Price of adult ticket [tex]= \£ 1[/tex]

[tex]'x'[/tex]represents the number of adults

[tex]'y'[/tex] reprsents the number of children

[tex]'z'[/tex] represents the number of pensioner

As per given condition we have,

[tex]x + y + z = 100\\\\\£3.50x + \£0.85y + \£1z = \£ 100[/tex]

Using trial and error method we get,

[tex]x = 3 ,\\\\y= 50\\\\z= 47[/tex]

For total number of  tickets

[tex]3 + 50 + 47 = 100[/tex]

Left hand side = Right hand side

Substitute in left hand side of total cost we get,

[tex]\£3.50(3) + \£0.85(50) + \£1(47) \\\\= \£10.50 + \£42.50 + \£47[/tex]

[tex]= \£ 100[/tex]

= Right hand side

Hence, as per the given data number of adults [tex]=3[/tex] , number of children [tex]= 50[/tex] and number of pensioner [tex]= 47[/tex].

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Answer:

(a) C: 0.0465 ; reject the null hypothesis

(b) B: 0.3409 ; fail to reject the null hypothesis

Step-by-step explanation:

Firstly, the decision rule based on P-value to reject the null hypothesis or fail to reject the null hypothesis is given by;

(a) Now, we are given alternate hypothesis, [tex]H_1[/tex] : p < 3/5

Also, z test statistics is -1.68. Since this is a left tailed test, so P-value is given by;

             P-value = P(Z < -1.68) = 1 - P(Z [tex]\leq[/tex] 1.68)

                           = 1 - 0.95352 = 0.0465

Since, the P-value of test statistics is less than the level of significance as 0.0465 < 0.05, so we have sufficient evidence to reject our null hypothesis due to which we reject the null hypothesis.

(b) Now, we are given alternate hypothesis, [tex]H_1[/tex] : p > 0.383

Also, z test statistics is 0.41. Since this is a right tailed test, so P-value is given by;

             P-value = P(Z > 0.41) = 1 - P(Z [tex]\leq[/tex] 0.41)

                           = 1 - 0.6591 = 0.3409

Since, the P-value of test statistics is more than the level of significance as 0.3409 > 0.05, so we have insufficient evidence to reject our null hypothesis due to which we fail to reject the null hypothesis.

To determine the null hypothesis's fate, compare the p-value to α = 0.05. For the first scenario, H1: p < 3/5 with the test statistic z = -1.68, the conclusion is unclear without the exact p-value. For the second scenario, H1: p > 0.383 with z = 0.41, we fail to reject the null hypothesis as the p-value (0.3409) is higher than α.

The task is to compare the p-value to the significance level (alpha, α) to determine if the null hypothesis should be rejected or not. If the p-value is less than or equal to α, reject the null hypothesis; otherwise, fail to reject it. The significance level given is α0.05.

First Scenario:

For H1: p < 3/5, the test statistic z = -1.68. Comparing the test statistic to the critical value for α=0.05 (which is between -1.65 and -1.64), -1.68 falls to the left of -1.65. However, without the exact p-value provided, the answer cannot be definitively chosen from the options. Still, the general rule is that if the test statistic is more extreme than the critical value, the null hypothesis is rejected.

Second Scenario:

For H1: p > 0.383, the test statistic z = 0.41. The p-value corresponding to z = 0.41 on the upper tail of a standard normal distribution is approximately 0.3409 (since the p-value is the area to the right of z). Therefore, the p-value is greater than α0.05, meaning that we fail to reject the null hypothesis.

Answer:

The answer is 5.

Step-by-step explanation:

Multiplicative rate of change can be described as the rate change based on a original amount or point.

If we look at the given points for the function f(x) = 2.5x, we can see that the x coordinates increase by one while the y coordinate is increasing by 5 times it's value for the previous point.

So we can say that the multiplicative rate of change is 5 for the function f(x) = 2.5x.

I hope this answer helps.

the answer is(b) 5 got it right on the test

Answer:

4 x 10^12

Step-by-step explanation:

I used a calculator.

(6x10^8) divided by (1.5 x 10^-4) is 4 x 10^12.

Division is the action of separating something into parts or the process of being separated.

How to solve?

While dividing;

[tex]\frac{6(10^8)}{1.5(10^-4)} \\\frac{6(10^8)(10^4)}{1.5}\\ 4(10^{12})[/tex]

The answer will be 4 x 10^12.

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Answer:

16

Step-by-step explanation:

The radius is half the size of the diameter.

8 * 2 = 16

Answer:

It can be factorised

Step-by-step explanation:

Given

x²y² + 36 - 4x² - 9y² ( rearranging )

x²y² - 4x² - 9y² + 36 ( factor first/second and third/fourth terms )

= x²(y² - 4) - 9(y² - 4) ← factor out (y² - 4) from each term

= (y² - 4)(x² - 9)

Both factors are a difference of squares and factor in general as

a² - b² = (a - b)(a + b)

Thus

y² - 4

= y² - 2² = (y - 2)(y + 2) , and

x² - 9

= x² - 3² = (x - 3)(x + 3)

Hence

x²y² + 36 - 4x² - 9y² = (y - 2)(y + 2)(x - 3)(x + 3)

Answer:

- 5xy + 4ab

Step-by-step explanation:

Rylee's total spending was $39.42 for clothing (including tax), $25 for gas, and $18.80 for groceries (after applying a 20% discount). Summing these up, her total expenditure for all purchases was $83.22.

This is a question involving basic arithmetic and percentage operations. In total, Rylee made three different purchases. She shopped for clothing costing $36.50 and paid 8% tax on it, which amounts to $36.50 * 0.08 = $2.92. Therefore, her total expenditure at the clothing store was $36.50 + $2.92 = $39.42. She then spent $25 to refuel her car.

Lastly, she bought groceries worth $23.50, but had a 20% discount coupon so she only paid 80% of the price, which is $23.50 * 0.80 = $18.80. If we add these expenditures together, we can find that Rylee's total spending was $39.42 (clothing) + $25 (gas) + $18.80 (groceries) = $83.22.

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Answer:

44

Step-by-step explanation:

f(x) = 6x-4

Let x=8

f(8) = 6*8 -4

    = 48 -4

    =44

Answer:

44

Step-by-step explanation:

f(x) = 6x – 4

f(8) = 6(8) – 4

= 48 - 4

= 44