Explain how to use a pattern to find the product of a power of 10 and a decimal?

You add the world by the power for example 10 to the power of 3 is 10 times 10 times 10. you would have to add the number to the other, for example, 1/2 times 2 would be = 0.50 + 0.50

D. triangular pyramid

4y - 6 + y^2 - 9 = y^2 + 4y - 15y^2 term terms- termstotal of 3 terms when simplified