Find the volume for the regular pyramid. V =

What is the value of 4x-7 when x=0?

olya-2409 [2.1K]

Answer:

-7

Step-by-step explanation:

= 4x - 7

= 4(0) - 7

= 0 - 7

= -7

5 0

4 years ago

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Mrs. Wallace bought a $125,000 CD with a term of 3 years. How much will she earn in 3 years?

Katena32 [7]

Answer: It depends on the banks APY

annual percentage yield

Step-by-step explanation: Let’s say your bank gives you a rate of 2.10 %,

If you purchase a CD $125,000 for a 3 year term. Your APY would be $8,041.52 for 3 years. So at the end of your CD term, you should have a balance of $133,041.52. Hope this gives you an idea.

7 0

3 years ago

Here are ten numbers

ser-zykov [4K]

Solution,

Given data=3, 7 , 2 , 4, 7, 5, 7, 1, 8, 8

a.Mode= 7 because it has more frequency in comparison to others.

b.Arranging the data in ascending order:

: 1,2,3,4,5,7,7,7,8,8

N(total number of items)=10

Median=(N+1/2)th item

 = (10+1/2)th item

 = (11/2)th item

 = 5.5th item

Again,

5th item+6th item/2

 = 5+7/2

=12/2

= 6

c. summation FX=52

 N=10

Mean= summationfx/N

 =52/10

 =5.2

D. Range= highest score- lowest score

 = 8-1

 =7

Hope it helps

Good luck on your assignment

4 0

4 years ago

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Mrs Watson runs a distance of 200 metres in 25 seconds work out the average speed of miss Watson in metres per second

natima [27]

8 meters per second. You get this by dividing the amount of meters by the amount of seconds. 200/25=8.

5 0

4 years ago

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We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 21

katen-ka-za [31]

Answer:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

Step-by-step explanation:

Data given and notation

$n_A = 21$ represent the sampe size for A

$n_B =16$ represent the sample size for B

$s_A = 28.284$ represent the sample deviation for A

$s_B = 20$ represent the sample deviation for B

$\alpha$ represent the significance level provided

F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:

$F=\frac{s^2_1}{s^2_2}$

Solution to the problem

System of hypothesis

We want to test if we have the same variation, so the system of hypothesis are:

H0: $\sigma^2_A = \sigma^2_B$

H1: $\sigma^2_A \neq \sigma^2_B$

Calculate the statistic

Now we can calculate the statistic like this:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

8 0

4 years ago