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3 years ago

10

I need help. I'm not quite sure which one to choose.

2 answers:

MArishka [77]3 years ago

7 0

I believe it is the first one. A. $\frac{x^2}{5^2}- \frac{y^2}{5^2}\ \textgreater \ 1$

valina [46]3 years ago

5 0

The answer to this question is C

careful at the sign they gave you

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A movable section of stage has the shape of an isosceles right triangle. You need to apply 2 coats of paint to all but the botto

Artemon [7]

Answer:

You need to buy 13 quarts of paint

Step-by-step explanation:

<u><em>The correct question is</em></u>

A movable section of stage has the shape of a right triangle. You need to apply 2 coats of paint (Assume you will not paint the bottom of the ramp). The paint covers approximately 80 square feet per quart. How many quarts of paint do you need to buy?

<u><em>The picture of the question in the attached figure</em></u>

step 1

we know that

The figure show a triangular prism

The surface area of the triangular prism is given by

$SA=2B+PL-(14)(19.5)$ ----> (the area of the bottom is not included)

where

B is the area of the triangular face

P is the perimeter of the triangular face

L is the length of the prism

we have

$B=\frac{1}{2}(14)(6)=42\ ft^2$

$P=14+6+15.2=35.2\ m$

$L=19.5\ ft$

substitute

$SA=2(42)+35.2(19.5)-(14)(19.5)=497.4\ ft^2$

step 2

You need to apply 2 coats of paint

so

Multiply the surface area by 2

$497.4(2)=994.8\ ft^2$

step 3

Divide the total square feet by 80 square feet per quart

so

$994.8/80=12.4\ quarts$

Round up

You need to buy 13 quarts of paint

6 0

3 years ago

Suppose a person eats 2000 food calories on average per day. Note that 1 calorie= 4.184 joules and a food calorie = 1000 calorie

Crazy boy [7]

Answer: $0.097\text{\ J/s}$

Step-by-step explanation:

Given : 1 calorie= 4.184 joules

A food calorie = 1000 calories = 4184 joules.

Then, 2000 food = $2\times4184=8368$ joules [By Unitary method]

We know that : $\text{Power}=\dfrac{\text{Energy}}{\text{Time}}$

Since 1 day = 24 hours

and 1 hour = 3600 seconds

Then, 24 hours = $24\cdot3600=86400$ seconds.

Now, $\text{Power}=\dfrac{8368}{86400}$

$=0.0968518518519\approx0.097\text{\ J/s}$

Hence, the average power of this intake = $0.097\text{\ J/s}$

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3 years ago

A pool toy is sinking at a constant rate toward the bottom of a pool. the equation y = -5x -4 can be used to represent this situ

professor190 [17]

Answer:

4

Step-by-step explanation:

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3 years ago

Which expression is equal to 48+72?

pav-90 [236]

A) 24(2+3)

hope this helps❤️

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3 years ago

Which quadratic equation has a vertex at (4, 2)?

kenny6666 [7]

Answer:

use mathaway or algebra calculator they help alot

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3 years ago