$34 divided by 4 = $8.5 per hour.
$8.5 Times 10 hours = $85
So she would earn $85
8.49 x 10⁻⁷ = 0.000000849
$50
20 x 2 = 40, which is 80%
and then 20 divided by 2 is 10; so you add that to 40 and you get your answer
Answer:
5
Step-by-step explanation:
take your price and subtract the monthly price
115-40=75
now you have the price of all your extra devices summed up
75÷15=5 extra devices