Question

Can someone show me where I went wrong?

Answer 1

I got 7491.72 for A and 75.73 for B. My answers according to Pearson are incorrect.

Answer 2

f(x)= -235.8+2272Ln30
= 7491.720451

B. f`(x)= (-235.8+2272Lnx)
=2272/x
=75.73

Answer 3

Your solutions seems correct to me.

Answer 4

If you use x=35 then your answers will match but I cant see the logic behind using 35

Answer 5

Me either. Its driving me mad.

Answer 6

The website must be wrong then

Answer 7

Wouldn't be the first time. I sent my professor an email about it. Thanks for helping.

Answer 8

No problem