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3 years ago

Find the surface area of a rectangular prism with length 7 m, width 5 m, and height 3 m.

Mathematics

2 answers:

elena55 [62]3 years ago

8 0

Answer: The surface area is 142m^2

Step-by-step explanation:

-The formula:

$A = 2(wl+hl+hw)$

-Solve:

$A =$ $2$ $(5$ × $7$ $)$ $+2$ $(3$ × $7)$ $+ 2$ $(3$ × $5)$

$A = 10$ × $7 + 6$ × $7 + 6$ × $5$

$A = 70 + 6$ × $7 +6$ × $5$

$A = 70 + 42 +6$ × $5$

$A = 112 + 6$ × $5$

$A = 112 +30$

$A = 142$

Therefore, the surface area of a rectangular prism is $142 m ^2$ .

Anastasy [175]3 years ago

3 0

Answer:

142 meters

Step-by-step explanation:

As= 2(lw+lh+wh)

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(01.04 MC)Simplify the following expression: (−4)(−2)(−3) A -24 B -11 C 11 D 24

lys-0071 [83]

Answer:

-24

Step-by-step explanation:

So in short this is what it means:

-4×-2×-3

So to work it out this is what you do:

Deal with the first two numbers; -4 × -2=8

It becomes an eight without a negative because when multiplying numbers with the same signs(positive or negative) the answer is always a positive number thus the answer becomes 8.

Then 8×-3=-24

This is because when multiplying a negative and positive numbers the answer is always a negative numbers thus -24.

So automatically the answer is -24.

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3 years ago

Read 2 more answers

Pic included Please answer!!!

TiliK225 [7]

The answer is -4 + 7. Because its subtracting 4 to zero which makes it -4. And then its adding 7 so the answer is -4+7

4 0

3 years ago

Read 2 more answers

Can someone please help me out with this

SashulF [63]

Answer:

4 = 15

Step-by-step explanation:

Make them equal to each other first

2x+15=x+30

Put like terms together

x=15

Hope this helped

7 0

3 years ago

A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages ar

Elenna [48]

Answer:

We conclude that the mean amount packaged is equal to 8.17 ounces.

Step-by-step explanation:

We are given that in a particular sample of 50 packages, the mean amount dispensed is 8.171 ounces, with a sample standard deviation of 0.052 ounces.

Let $\mu$ = population mean amount packaged.

So, Null Hypothesis, $H_0$ : $\mu$ = 8.17 ounces {means that the mean amount packaged is equal to 8.17 ounces}

Alternate Hypothesis, $H_A$ : $\mu\neq$ 8.17 ounces {means that the mean amount packaged is different from 8.17 ounces}

The test statistics that will be used here is One-sample t-test statistics because we don't know about the population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean amount dispensed = 8.171 ounces

s = sample standard deviation = 0.052 ounces

n = sample of packages = 50

So, the test statistics = $\frac{8.171-8.17}{\frac{0.052}{\sqrt{50} } }$ ~ $t_4_9$

= 0.1359

The value of t-test statistics is 0.1359.

Also, the P-value of test-statistics is given by;

the meaning of the p-value is that the p-value is the probability of obtaining a sample mean that is equal to or more extreme than 0.001 ounces away from8.17 if the null hypothesis is true.

P-value = P( $t_4_9$ > 0.136) = More than 40% {from the t-table}

Since the P-value of our test statistics is more than the level of significance of 0.01, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region.

Therefore, we conclude that the mean amount packaged is equal to 8.17 ounces.

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3 years ago

Derrick goes to the store and buys a pair of shoes for $79.99, a shirt for $24.99, and a pair of shorts for $34.99. If the sales

alexandr402 [8]

Answer:

sales tax is 11.89745 round if u want

Step-by-step explanation:

i just added 8.5 percent

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2 years ago