aaron pays $35 per month for cell phone service. on his
plan, he can send and receive 100 text messages for free.
after that, he pays $0.20 for each additional text. last
month, aaron sent and received 143 text messages. aaron
typed in the keystrokes 143 - 100*0.2 + 35 into his
calculator to determine the total amount of his bill this
month
aaron's keystrokes were correct, and the calculator will
show the correct solution of 43.6.
aaron should calculate at least the first step without the
use of a calculator
the calculator will subtract 100 from 143 as the first step
of the calculations using aaron's keystrokes
the calculator will multiply 100 by 0.20 as the first step of
the calculations using aaron's keystrokes
aaron's keystrokes were incorrect, and the calculator will
show an incorrect solution of 158

(i) Aaron should calculate at least the first step without the  use of a calculator.

(ii) The calculator will multiply 100 by 0.20 as the first step of  the calculations using Aaron's keystrokes.

(iii) Aaron's keystrokes were incorrect, and the calculator will  show an incorrect solution of 158.

Step-by-step explanation:

Aaron pays $35 per month for cell phone service. On his plan, he can send and receive 100 text messages for free.

After that, he has to pay $0.20 per extra text. Last month, Aaron sent and received 143 text messages. Aaron typed in the keystrokes 143 - 100*0.2 + 35 into his calculator to determine the total amount of his bill this month. Then,

(i) Aaron should calculate at least the first step without the use of a calculator.

(ii) The calculator will multiply 100 by 0.20 as the first step of the calculations using Aaron's keystrokes.

(iii) Aaron's keystrokes were incorrect, and the calculator will show an incorrect solution of 158. (Answer)

step-by-step explanation:

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