Answer:
1)2500
2) 1500
3)2.5%
Step-by-step explanation:
1) the standard formula for interest is i=prt where i= interest, p= principal and t=time
In the first scenario, everything but the principal is given so lets substitute the info into the equation:
75=p*0.03*1
75= 0.03p
75/0.03=p
2500=p
Same thing for second scenario, just different numbers
120=0.04*2*p
120=0.08p
1500=p
This time everything but the rate is given:
250=10000*1*r
250=10000r
Divide both sides by 10000
0.025=r
2.5%=rate(convert into percentage)
Hope this helps!
Answer:
It took him 6.75 hours
or 6 hours and 45 minutes
Step-by-step explanation:
The first two hours he travels
50 mi/h *2 h = 100 mi
then a 15 min break
then 2 more hours
50 mi/h *2 h = 100 mi
then a 30 min break
then 2 more hours
50 mi/h *2 h = 100 mi
3 miles. Using cross-multiplication, 3×4 = 12 and 4×1 = 4, so 12/4 = 3.
Material needed = πD x height
π x 3 x (3 x 12) //multiply by 12 to change the 3 feet to inches
= 339.29 in²
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Answer: 339.29 in²
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