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Novay_Z [31]
2 years ago
7

The school has arranged to have the gym walls plastered. It takes 200 pounds of lime to make one batch of plaster. Each batch of

plaster will cover 45 square yards of wall. How much lime will be needed to finish 855 square yards of wall? 21,375 pounds 3,762 pounds 38,475 pounds 3,800 pounds
Mathematics
1 answer:
elixir [45]2 years ago
4 0

Answer:

D or 3800

Step-by-step explanation:

Just divided 855 by 45 then multiplied 200 by 19

Please mark me brainlest

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Which ordered pairs lie on the graph of the exponential function f(x)=−3^(x−1) +2 Select each correct answer.
katrin [286]
<h3>Answer:</h3>

(1, 1), (4, -25)

<h3>Step-by-step explanation:</h3>

You can evaluate the function to see.

f(-1) = -3^(-1-1)+2 = -3^(-2)+2 = -1/9 +2 ≠ 2

f(1) = -3^(1-1) +2 = -1 +2 = 1

f(0) = -3^(0-1) +2 = -1/3 +2 ≠ 0

f(4) = -3^(4 -1) +2 = -27 +2 = -25

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Or, you can graph the points and the curve.

8 0
3 years ago
Which equation can be simplified to find the inverse of y = 2x²?
siniylev [52]

Answer:

y=1/2x²

Step-by-step explanation:

y=2x-²

y=1/2x²

8 0
3 years ago
Write the differential equation model that fits the given description. (a) The rate of change of the volume of a snowball (due t
miskamm [114]

Answer:

a) he rate of change of the volume of a snowball (due to melting) is proportional to the square of the volume at time t. Initially, the snowball has a volume of 900 cm3

\frac{dV(t)}{dT} = A*V(t)^{2} \\ and V(0) = 900cm^{3}

where A is a real constant, it appears because it says that the change i volume (dV/dt) is "proportional" to V(t)^{2}. Furthermore, we should assume that A is a negative number, because the volume of the snowball will decrease as the time pasese by.

(b) For an insect moving along some path, the velocity at time t is proportional to the square root of its position.

\frac{dr(t)}{dt}  = B*\sqrt{r(t)}

Here again appears a constant B for the "proportional" part. And i wrote the velocity as \frac{dr(t)}{dt} "the rate of change of the position with respect to te time".

7 0
3 years ago
Are the fractions equivalent?
dangina [55]

Answer:

7. no

8.yes

9.yes

10.no

I hope this helps!

4 0
2 years ago
Read 2 more answers
Convert to %<br><br> 1) 1/2<br><br> 2) 1/4<br><br> 3) 1/3<br><br> 4) 3/10<br><br> 5) 6.5/10
inna [77]

Answer:

1) 50%

2) 25%

3) 33.33 %

4) 30%

5) 65%

6 0
2 years ago
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