The ideal length of a particular metal rod is 30.5 cm. the measured length may vary from the ideal length by at most 0.015 cm. what is the range of acceptable lengths for the rod?

Remark

The rod goes from 30.5 - 0.015 to 30.5 + 0.015

Calculations

30.5 - 0.015 = 30.485

30.5 + 0.015 = 30.515

The range = 30.485 cm. to 30.515 cm.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)