Answer:
1 hour and 20 minutes
Step-by-step explanation:
If 4 people take 3 hours, 1 person will take 4 times as long. This is 4*3=12 hours. If 9 people do it, it will take 1/9 of the time 1 person takes to do it, which is 12/9 = 1.3 recurring, or 1 and 1/3 of an hour.
Invested at 7%: s
Invested at 5.5%: f
Then s+f=$15000, or f= $15000-s
Then add together the 2 interest amounts:
i = s(0.07) at 7%
i = f(0.055) at 5.5%
Then 0.07s + (15000-s)(0.055) = $952.50
Solve this for s, the amt. invested at 7%:
0.07s + 15000(0.055) - 0.055s = 952.50
Combining the s terms,
0.015s = 952.50-825
952.50-825
Then s = ------------------- = 8500
0.015
Ruth invests $8500 at 7% and $6500 at 5.5%.
Answer: 0.533
Step-by-step explanation:
You could use a calculator.
8÷15=0.533333333...
Integers are whole numbers, whether they are negative or positive. They cannot be decimals, or fractions.
The numbers listed are 8, -4.1, -9, 1/6, 1.75 and 22.
The only integers are 8, -9, and 22; the other numbers are rational numbers.
3*16^(1/3) =
3*(8*2)^(1/3)
3*8^(1/3)*2^(1/3)
3*2*2^(1/3)
6 times cube root of 2 choice B
