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Vanyuwa [196]
3 years ago
12

One pint of chalkboard paint covers 60 square feet. What is the least number of pints needed to paint the walls of a room in the

shape of a rectangular prism with a length of 15 feet a width of 13 feet and a height of 10 feet
Mathematics
1 answer:
mylen [45]3 years ago
6 0

Answer:

15.833 pints of chalkboard paint

Step-by-step explanation:

Surface area of a rectangular prism = 2(lw × hl × hw)

Where,

L = length = 15 feet

w = Width = 13 feet

h = height = 10 feet

Surface area of a rectangular prism = 2(lw + hl + hw)

= 2(15*13 + 10*15 + 10*13)

= 2(195 + 150 + 130)

= 2(475)

= 950 square feet

One pint of chalkboard paint covers 60 square feet

Least number of pints needed to paint the walls = 950 square feet / 60 square feet

= 15.833 pints of chalkboard paint

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miskamm [114]

Answer: Probability that a plant grows at a constant rate, given it is edible is given by \frac{35}{38}.

Step-by-step explanation:

Let B be an event that getting a plant grows at a constant rate.

Since we have given that

The probability that a plant is edible is given by

P(A)=\frac{4}{5}

The probability that a plant grows at a constant rate and is edible is given by

P(A\cap B)=\frac{14}{19}

We will use "Conditional probability ", i.e.

P(A\mid B)=\frac{P(A\cap B)}{P(A)}

P(A\mid B)=\frac{\frac{14}{19}}{\frac{4}{5}}\\\\P(A\mid B)=\frac{14\times 5}{19\times 4}\\\\P(A\mid B)=\frac{70}{76}\\\\P(A\mid B)=\frac{35}{38}

Hence, Probability that a plant grows at a constant rate, given it is edible is given by \frac{35}{38}.

8 0
4 years ago
According to Greg, the perfect cherry pies have a ratio of 240 cherries to 3 pies. How many cherries does Greg need to make 9 pe
harkovskaia [24]

Answer:

720 cherries

Step-by-step explanation:

3 pies need 240 cherries so the equation would be:

3c = 240

so, <u>c = 80</u>

But, he needs to make 9 "perfect" pies so you make the equation:

9c = 80*9

9c = 720

So Greg needs 720 cherries to make 9 perfect cherry pies.

6 0
3 years ago
Find the value of x.<br> (5x +13)<br> (4x+ 2)°<br> (2x -9)
SOVA2 [1]

Answer:

x = 20

Step-by-step explanation:

By exterior angle theorem, we have:

(4x + 2) \degree + (2x  - 9) \degree = (5x + 13) \degree \\  \\(4x + 2 + 2x - 9) \degree  = (5x + 13) \degree\\  \\(6x  - 7) \degree  = (5x + 13) \degree \\  \\ 6x - 7 = 5x + 13 \\  \\ 6x - 5x = 13 + 7 \\  \\ x = 20

5 0
3 years ago
I need help on this question plz
antoniya [11.8K]
Rotation of 180° clockwise change the coordinates from (x,y) to (-x,-y).
If the image point has the coordinates (3,-5).
It means (-x,-y) = (3,-5)
- x = 3  \: \: and  \: \:  - y =  - 5 \\ x =  - 3 \: \:  and  \: \: y = 5
So pre-image point was (x,y) = (-3,5)

Hence, option C i.e. (-3,5) is the final answer.

3 0
3 years ago
Please help me with this geometry question !!
mezya [45]

Answer:

see explanation

Step-by-step explanation:

Given the rule (x, y ) → (x + 5, - y )

Add 5 to the original x- coordinate and make the y- coordinate negative.

(a)

(5, 3 ) → (5 + 5, - 3 ) → (10, - 3 )

(b)

(- 2, 7 ) → (- 2 + 5, - 7 ) → (3, - 7 )

3 0
3 years ago
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