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Svetach [21]
3 years ago
15

SOMEONE PLEASEEEE HELPPPP?!?!?!?!!?

Mathematics
1 answer:
Zarrin [17]3 years ago
8 0

Answer:

Step-by-step explanation:

Top/Bottom = 12

Sides = 15

Front/Back = 20

20 + 15 + 12 = 47

47 / 1/2 = 23.5

You might be interested in
Greer company pays jamal perry a salary of $2,200 per week. how much fica tax must greer pay on jamal's behalf, including both t
ludmilkaskok [199]
The fica tax rate from employer will be 7.65 % of the salary.

= 7.65 % x $ 2,200 

= $ 168.3 

Multiply it by 52 if you want yearly number
4 0
3 years ago
Suppose a tank contains 400 gallons of salt water. If pure water flows into the tank at the rate of 7 gallons per minute and the
Strike441 [17]

Answer:

Step-by-step explanation:

This is a differential equation problem most easily solved with an exponential decay equation of the form

y=Ce^{kt}. We know that the initial amount of salt in the tank is 28 pounds, so

C = 28. Now we just need to find k.

The concentration of salt changes as the pure water flows in and the salt water flows out. So the change in concentration, where y is the concentration of salt in the tank, is \frac{dy}{dt}. Thus, the change in the concentration of salt is found in

\frac{dy}{dt}= inflow of salt - outflow of salt

Pure water, what is flowing into the tank, has no salt in it at all; and since we don't know how much salt is leaving (our unknown, basically), the outflow at 3 gal/min is 3 times the amount of salt leaving out of the 400 gallons of salt water at time t:

3(\frac{y}{400})

Therefore,

\frac{dy}{dt}=0-3(\frac{y}{400}) or just

\frac{dy}{dt}=-\frac{3y}{400} and in terms of time,

-\frac{3t}{400}

Thus, our equation is

y=28e^{-\frac{3t}{400} and filling in 16 for the number of minutes in t:

y = 24.834 pounds of salt

6 0
3 years ago
May someone please help?
Ronch [10]
(-7,3) here is the answer, easy one
8 0
3 years ago
Read 2 more answers
What is the equation of a horizontal line that passes through the point (3,-5)?
Kryger [21]

your answer for this question is y=c hope this helps

5 0
2 years ago
2*4*8<br> Help again<br> please help
liq [111]
2*4*8 is 64 2*4 is 8 and 8*8 is 64
7 0
3 years ago
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