Calculate log5 42 (where log5 means log to the base 5). rewrite as a logarithm to the base 8.

Part 1)                                                      

Part 2)

Step-by-step explanation:  

we know that        

The can be converted to the base b by the formula

Part 1) Calculate

Convert to base 10

Part 2) Rewrite as logarithm to the base 8

we know that

The can be converted to the base b by the formula

In this problem we have

Applying the formula

Changing the base of a  logarithm

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70