Answer:

Step-by-step explanation:
Let
x -----> Hermione was earning before the pay raise
we know that

so
The linear equation that represent this problem is

Solve for x
Divide by 1.05 both sides


Answer:
80
Step-by-step explanation:
because 8 is in tens place
so it´s value is 8*10=80
Answer:
138$
Step-by-step explanation:
120$. Increased by 15%.
Since 15% equals to 0.15, you multiply 0.15 by the price.
0.15*120=18.
Then you ADD the 15%.
120+18=138
The new price is now 138$
Answer:
B and E are True.
Step-by-step explanation:
B 12.19 is a terminating decimal so it is rational.
E its a ratio of 2 integers so its rational.
A - is not repeating so this is false.
C. a perfect square is rational - 16 can be written as 16/1.
D. 6 is rational because it can be written as 6/1 not because its not a perfect square.
So, there is an exponential growth formula you use.
First, write the initial cost which is
60,000
Then write 1+ the percentage of growth rate which is 0.04 percent. Then, right the time as an exponent after certain amount of years.
60,000(1+0.04)^10
60,000(1.04)^10
Plug this in a calculator
it should be 88814.6571
I hope this helps.