The third angle should be 83.
90+7+83=180
Answer:
(a) $1120 (c) 12.75hrs
Step-by-step explanation: see attachment
21 is a rational number because it is an integer, which can be converted into a fraction.
<u>Step-by-step explanation:</u>
When a denominater and numerator are integers and gives a quotient then it is a rational number.
21/1, where 21 is denominator and 1 is numerator the quotient is 21. Therefore 21 is a rational number which can also be considered as a ratio.