Answer:
<u>Volume</u><u>:</u> 1135.82 yd³
<u>Surface Area</u><u>:</u> 657.12 yd²
Step-by-step explanation:
V = whl
12.2 · 9.8 · 9.5
1135.82
A = 2(wl + hl + hw)
2 · (12.2 · 9.5 + 9.8 · 9.5 + 9.8 · 12.2)
657.12

Use distributive property: a(b - c) = ab - ac

Answer:\
Working alone Joan finish the job in 60 minutes, which means every minute she does 1/60 of the whole job.
suppose the sister can finish the job alone in x minutes, every minute she does 1/x of the whole job.
together they do (1/60 +1/x) part of the job every minute.
for 40 minutes they finish the whole job: (1/60 +1/x)*40=1 (1 represents the whole job)
40/60 +40/x =60/60
40/x=20/60
x=120
so it will take the sister 2 hours to finish the job alone
Answer:
Given that,
A wealthy businessman invests $10,000.
It expects a 6.75% rate of return annually.
To find: the number of years it take the investment to reach at least $15,000 in value.
Explanation:
we know that,
Amount invested at r% rate of interest after t years is,

where P is the initial investment.
Substitute the values we get,

we get,


we get,

Calculating this we get,

Round to the nearest number of years.
we get,

6 years will it take the investment to reach at least $15,000 in value.
Answer is: 6 years will it take the investment to reach at least $15,000 in value