metric conversion table
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metric ruler
Suppose that a volcano is erupting and readings of the rate at which solid materials are spewed into the atmosphere are given in the table. The time t is measured in seconds and the units for are tonnes (metric tons) per second.
Give the upper and lower estimates for the total quantity of erupted materials after six seconds.
Use Midpoint Rule to estimate.
The cost of a table lamp was 2/3 the cost of a fan. A coordinator spent 3/5 of his money on 12 table lamps and 2 fans. He then used the rest of his money to buy another 4 fans and 2 table lamps.
(a) If he had spent all his money on the table lamps, how many table lamps could he have bought?
(b) How many table lamps did he buy altogether?