Answer:
1) 477.5
2) 395.8
3) 2042.0
4)132.7
5) 44.1
6) 437.9
Step-by-step explanation:
Surface area of a cylinder = 2(pi)(r)(h) + 2 (pi)(r)^2
Lateral area of a cylinder = 2 (pi)(r)(r)
Answer:
4
Step-by-step explanation:
2×4 is the only one that equals less than 9, 2× 4.5 is 9, 2×5.5 is 11, 2×6 is 12, and the question is trying to get below 9, so 4 is the only answer that can get below 9
Answer:
7.8
Step-by-step explanation:
Let's say that the value invested in the account with a rate of 8% is "x", then the amount invested in the account with a rate of 12% is:

To calculate the total interest we need to calculate the interest of each individual account and sum them:

The total interest is the sum of the two expressions above:

The value invested in the account with 8% interest is 830, the one invested in the account with 12% interest is 1280.