To find the answer, we can use the percentage above to find the amount of silica in 92kg of boulder of basalt.
If the Basalt is with 45 percent of silica:
92×45%
=41.4kg
If the Basalt is with 52 percent of silica:
92×52%
=47.84kg
We can then take the average to predict the amount of silica by using the lowest and highest approximation:
(41.4+47.84)÷2
=89.25÷2
=44.62kg
Therefore,the answer is 44.62kg.
Hope it helps!
