All categories

4 years ago

3. Here is a list of exam scores for Mr. Kraft's calculus class:

Mathematics

1 answer:

Alja [10]4 years ago

4 0

Answer

15%

Step-by-step explanation:

I think the answer is 15% because when we talk about percentile, we are actually subtracting from 100% in simpler terms. If we say a 85th percentile, it actually means 15%.

You might be interested in

What's the slope of a line that passes through (-8,-16) and (18,5)?

frosja888 [35]

Answer:

C. 21/26

Step-by-step explanation:

Slope Formula: $m = \frac{y2-y1}{x2-x1}$

Plug in our coordinates:

m = (5 + 16)/(18 + 8)

m = 21/26

4 0

4 years ago

Read 2 more answers

14 a and b please !!!

leva [86]

14a

$\frac{2}{3x - 2c} + ( - ( \frac{3}{2x - 3c} )) = \frac{7}{2c}$

$\frac{2}{3x - 2c} - \frac{3}{3x - 2c} = \frac{7}{2c}$

$\frac{2 - 3}{3x - 2c} = \frac{7}{2c}$

$\frac{ - 1}{3x - 2c} = \frac{7}{2c}$

Next, cross-multiply.

$- 2c = 21x - 14c$

$12c = 21x$

$x = \frac{7}{4} c= 1 \frac{3}{4} c$

4 0

3 years ago

A carry out container is shown. The bottom base is a 4-inch square and the top base is a 4-inch by 6-inch rectangle. The height

seropon [69]

Answer: 100

Step-by-step explanation: I don't really have a step-by-step explaination, but I do know that the answer is 100.

4 0

3 years ago

It has been hypothesized that the standard deviation of the germination time of radish seeds is 8 days. The standard deviation o

Yanka [14]

Answer:

$\chi^2 =\frac{60-1}{64} 36 =33.19$

The degrees of freedom are:

$df= n-1= 60-1= 59$

And the p value would be given by:

$p_v =2*P(\chi^2 >33.19)=0.0053$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true deviation is different from 8 days.

Step-by-step explanation:

Data given

$n=60$ represent the sample size

$\alpha=0.01$ represent the confidence level

$s^2 =6^2 =36$ represent the sample variance obtained

$\sigma^2_0 =8^=64$ represent the value that we want to test

Hypothesis to test

We want to verify if the true deviation is equal to 8 days o not, so the system of hypothesis would be:

Null Hypothesis: $\sigma^2 = 64$

Alternative hypothesis: $\sigma^2 \neq 64$

The statistic is given by:

$\chi^2 =\frac{n-1}{\sigma^2_0} s^2$

Replacing we got:

$\chi^2 =\frac{60-1}{64} 36 =33.19$

The degrees of freedom are:

$df= n-1= 60-1= 59$

And the p value would be given by:

$p_v =2*P(\chi^2 >33.19)=0.0053$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true deviation is different from 8 days.

6 0

3 years ago

Howard planted 20 trees in 4 days. Janet planted 20 trees in 6 days. How long would it take them to plant 20 trees working toget

kipiarov [429]

Answer: I would say 5 days.

Step-by-step explanation:

I added both days together and divided by 2 because there are two individuals working on 20 trees and divided equally it would be 10 and it would take 5 days because that’s half.

6 0

4 years ago