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jek_recluse [69]

2 years ago

14

Find the volume of a pyramid with a square base where the side length of the base is 16.6 and the height of the pyramid is 9.1

1 answer:

photoshop1234 [79]2 years ago

8 0

Answer:

835.865333

Step-by-step explanation:

16.6×16.6=275.56

275.56×9.1=2507.596

2507.596÷3=835.865333

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Five students visiting the student health center for a free dental examination during National Dental Hygiene Month were asked h

svetlana [45]

Answer:

A 95% confidence interval for the mean number of months elapsed since the last visit to a dentist, is $[5.79063, 28.20937]$

Step-by-step explanation:

We will build a 95% confidence interval for the mean number of months elapsed since the last visit to a dentist. A (1 - $\alpha$ ) x100% confidence interval for the mean number of months elapsed since the last visit to a dentist with unknown variance and is given by:

$[\bar x -T_{(n-1,\frac{\alpha}{2})} \frac{S}{\sqrt{n}}, \bar x +T_{(n-1,\frac{\alpha}{2})} \frac{S}{\sqrt{n}}]$

$\bar X = 17$

$n = 5$

$\alpha = 0.05$

$T_{(n-1,\frac{\alpha}{2})}=2.7764$

$S = 9.0277$

$[17 -2.7764 \frac{9.0277}{\sqrt{5}}, 17 +2.77644 \frac{9.0277}{\sqrt{5}}]$

A 95% confidence interval for the mean number of months elapsed since the last visit to a dentist, is $[5.79063, 28.20937]$

5 0

3 years ago

The sine of 72 degrees is 0.95. What's the cosine of 18 degrees?

never [62]

the answer to ur question is 0.95

7 0

3 years ago

Allen is running a marathon. He would like to finish the race in under 5.5 hours. He has already run 3 hours. The inequality 3 +

fredd [130]

Answer:

t < 2.5

A

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Steve buys 2 lb of grapefruit and 3 lb of oranges for $7.20. Kennedy buys 4 lb of grapefruit and 2 lb of oranges for $8.80. Let

MrMuchimi

Answer: $\left \{ {{2x+3y=7.20} \atop {4x+2y=8.80}} \right.$

Step-by-step explanation:

Let be "x" the price per pound for grapefruit, "y" the price per pound for oranges.

We know that Steve buys 2 pounds of grapefruit and 3 of oranges for $7.20.

This means that the sum of the products of $2x$ and $3y$ is $7.20. Then, we can write this equation to represent it:

$2x+3y=7.20$

Kennedy buys 4 pounds of grapefruit and 2 pounds of oranges for $8.80.

This means that the sum of the products of $4x$ and $2y$ is $8.80. Then, we can write this equation to represent this:

$4x+2y=8.80$

Therefore, we get that the system of equations that models the situation is:

$\left \{ {{2x+3y=7.20} \atop {4x+2y=8.80}} \right.$

8 0

3 years ago

Sahil chooses a number, divides it by 8 , adds 8 to the answer. Then multiples the answer with 8 . He obtains the result as 952

babunello [35]

Answer:

888

Step-by-step explanation:

Sahil chooses a number, [We'll call it x]

divides it by 8 , [x/8]

adds 8 to the answer. [(x/8) + 8]

Then multiples the answer with 8 . [((x/8) + 8)*8]

He obtains the result as 952 . [((x/8) + 8)*8 = 952]

The number he chooses in the beginning was

((x/8) + 8)*8 = 952

x + 64 = 952

x = 888

CHECK:

Does (888/8 + 8)*8 = 952?

(119)*8 = 952? YES

The number is 888

8 0

2 years ago