Answer: First Option is correct.
Step-by-step explanation:
Since we have given that
Number of hours Chance can wash the car = 2 hours
Number of hours Sandy can wash the car = 4 hours
Work done by Chance per hour is given by

Work done by Sandy per hour is given by

Work done by altogether per hour is given by

So, Number of hours they take if they together wash the car is given by

Hence, First Option is correct.
First, do 100-14 to find out how much percent doesn't get the coupon= 85
then find 85% of 64= 54.4
finally, your answer is: 54.4
Answer:
triangle
Step-by-step explanation:
All of the answers are correct except the last one
Answer:
Because she is concluding that her class is an accurate representation of the overall school. The sample size in this case is too small and should increase her sample size(the amount of people surveyed) in order to get a better result.