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3 years ago

Find the surface area of this rectangular prism. Be sure to include the correct unit in your answer.

Mathematics

1 answer:

nlexa [21]3 years ago

4 0

Answer:

190 ft^2

Step-by-step explanation:

So first we need to find which equation we're using and since it's a rectangular prism we're going to use:

2Lw + 2wh + 2Lh

Now what we need to do is plug in the values

2*9*2 + 2*2*7 + 2*9*7

Now just multiply everything and then add it together.

36 + 28 + 126

Once you add everything together you get:

190

The question says to include the correct unit. It says that its feet, but we need to know if its feet squared (^2) or cubed (^3)

If it were area of the whole object, it would be cubed because it is all the area that the object takes up but since it's just the area of the surface it's going to be squared. Therefore, the answer is:

190 ft^2

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Jacks living room is 16 feet by 20 feet long. if a scale drawing of his living room uses a scale of 3/4 inches= 6 feet, find the

Juli2301 [7.4K]

Answer:

40 inches

Step-by-step explanation:

16×20=320

320÷6=53.33

53.33×3=159.99

159.99÷4=39.9975

39.9975 rounded would be 40

6 0

2 years ago

The figures in the picture are similar to each other find the value of x

alisha [4.7K]

Answer:

x = 7

Step-by-step explanation:

Similar figures have sides that are proportional. Setting up a proportion for the sides of the figures will help solve for 'x':

$\frac{small}{large}=\frac{3}{6}=\frac{(x-3)}{(x+1)}$

Cross-multiply: 3(x + 1) = 6(x - 3)

Distribute: 3x + 3 = 6x - 18

Combine like terms: 21 = 3x

Solve for 'x': x = 7

6 0

2 years ago

Let f(y) = y^4 - 3y^3 + y - 3 and g(y) = y^3 + 7y^2 - 2. Find f(y) + g(y). Write your answer as a polynomial with terms of decre

Anarel [89]

<h3>Answer: y^4 - 2y^3 + 7y^2 + y - 5</h3>

Work Shown:

h(y) = f(y) + g(y)

h(y) = (y^4 - 3y^3 + y - 3) + (y^3 + 7y^2 - 2)

h(y) = y^4 - 3y^3 + y - 3 + y^3 + 7y^2 - 2

h(y) = y^4 + (-3y^3+y^3) + 7y^2 + y + (-3 - 2)

h(y) = y^4 - 2y^3 + 7y^2 + y - 5

This is a fourth degree polynomial (aka quartic).

5 0

2 years ago

An average person in the country needs 2,450 kilocalories(kcal) / day of food to meet their full nutritional needs. The average

OlgaM077 [116]

Answer:

The answer to your question is 0.057 ha

Step-by-step explanation:

Data

Kilocalories needed for a person per day = 2450

Kilocalories produced per hectare = 15737000

Process

1.- Calculate the number of kcal needed per a person for a year

2450 kcal ----------------- 1 day

x ----------------- 365 days

x = (365 x 2450) / 1

x = 894250 kcal

2.- Calculate the amount of land needed

15737000 kcal ------------- 1 ha

894250 kcal ------------ x

x = (894250 x 1) / 15737000

x = 0.057 ha

7 0

3 years ago

Find the surface area.

Triss [41]

Answer:

196 $ft^{2}$

Step-by-step explanation:

Surface are of 2 rectangles = 2(2*4) = 16 $ft^{2}$

surface are of the base rectangle = 4*3 = 12 $ft^{2}$

Area of tow triangles =2( $\frac{1}{2}$ * 2* 2)= 4 $ft^{2}$

total = 16+12+4

= 196 $ft^{2}$

3 0

3 years ago