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2 years ago

Find the volume of the prism. 3 ft 7 ft 5 ft

Mathematics

2 answers:

Phantasy [73]2 years ago

7 0

Answer:

105 ft

Step-by-step explanation:

length times width times height is the formula to find it.

Taya2010 [7]2 years ago

6 0

Answer:

105

Step-by-step explanation:

I am guess this prism is a rectangle

So 3 times 7 times 5 is 105

Thus the answer is 105

Hope this helps!

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Use foil (a + 3)(a - 2)

blsea [12.9K]

Answer:

$\left(a+3\right)\left(a-2\right)=a^2+a-6=$

Step-by-step explanation:

Given expression is $\left(a+3\right)\left(a-2\right)$ .

Now we need to multiply this using FOIL.

F = First $=\left(a\right)\left(a\right)= a^2$

O = Outside $=\left(a\right)\left(-2\right)= -2a$

I = Inside $=\left(3\right)\left(a\right)= 3a$

L = Last $=\left(3\right)\left(-2\right)= -6$

Hence we get :

$\left(a+3\right)\left(a-2\right)=a^2-2a+3a-6=a^2+a-6=$

7 0

3 years ago

Read 2 more answers

Sandy mixed together 9 gallons of one brand of juice and 8 gallons of a second brand of juice, which contains 48 percent real fr

Gekata [30.6K]

Answer:

14 % pure juice comes from first brand

Step-by-step explanation:

Mixture:

17 gal 30% contains: 17x 30% = 5.10 gal pure juice

Second brand:

8 gal 48% contains: 8x40% = 3.84 gal pure juice

5.10 − 3.84 = 1.26 gal

1.26 gal is coming from 9 gal of first brand

The percentage of first brand is:

(1.26/9) x100 = 14 % pure juice.

8 0

3 years ago

X decreased by 7 is 38

marshall27 [118]

Answer:

Step-by-step explanation:

x - 7 = 38

add 7 to both sides to get the variable by itself

x = 45

7 0

3 years ago

Pls help it for math

Morgarella [4.7K]

I think it’s 8

Hope it helps

7 0

3 years ago

A random sample of 250 students at a university finds that these students take a mean of 15.3 credit hours per quarter with a st

SpyIntel [72]

Answer: $15.3\pm0.198$

(15.102, 15.498)

Step-by-step explanation:

The formula to find the confidence interval $(\mu)$ is given by :-

$\overline{x}\pm z_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

, where n is the sample size

$s$ = sample standard deviation.

$\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Two tailed z-value for significance level of $\alpha$ .

Given : Confidence level = 95% = 0.95

Significance level = $\alpha=1-0.95=0.05$

$s= 1.6$

$\overline{x}=15.3$

sample size : n= 250 , which is extremely large ( than n=30) .

So we assume sample standard deviation is the population standard deviation.

thus , $\sigma=1.6$

By standard normal distribution table ,

Two tailed z-value for Significance level of 0.05 :

$z_{\alpha/2}=z_{0.025}=1.96$

Then, the 95% confidence interval for the mean credit hours taken by a student each quarter :-

$15.3\pm (1.96)\dfrac{1.6}{\sqrt{250}}\\\\ =15.3\pm 0.19833\\\\=\approx15.3\pm0.198\\\\=(15.3-0.198,\ 15.3+0.198)=(15.102,\ 15.498)$

Hence, the mean credit hours taken by a student each quarter using a 95% confidence interval. =(15.102, 15.498)

5 0

3 years ago