Rounding to the nearest tenth does not make sense as the other numbers only have precision to the nearest whole number. Had they been reported as R = 6.0 m and h = 17.0 m, MAYBE asking to the nearest tenth would be reasonable. To be very precise, asking to the nearest tenth means the results have four significant digits and the dimensions and π should have been reported as R = 6.000 m, h = 17.00 m and π = 3.142
If 11 oranges cost $2.35, we could calculate the cost of each of these oranges, simply dividing the total cost ($2.35) between the amount of oranges bougth (11). This will give us the cost of a single orange, that is, the unitary cost= .
Then, if we want to know the cost of 18 oranges, we just have to multiply the cost of a single orange (0.21) by 18: 0.21x18 = 2.85
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