Question

Someone please help me solve this
40=250(0.89)^x

Answer 1

Answer: 15.72575

Explanation:

Divide 250 over:

40/250=(0.89)^x

Log both sides (easiest with graphing calculator)

Remember exponent comes down in front on a log

Log(0.16) = x log (0.89)

X= Log (.16) / log (0.89)