Question

Please help I’m struggling!

1.
The cost of a luncheon is $100.00 plus $12.00 per person.
What is the rate of change for this relation?
A. 100
B. 12
C. 88
D. 8.33
2.
Maya's distance from the finish line in a marathon is given by the formula
D = 60-11t, what t is the time in minutes and D is the distance from the finish line in metres.
Approximately how far from the finish line is Maya after 2.4 min?
1: 25 km
B. 30 km
C. 34 km
D. 47 km

Answer 1

See below

Explanation:

The rate of change is how much does it change for each person added

this is equal to $ 12

Sub in 2.4 for t to find D

D = 60 - 11 t

D = 60 - 11 (2.4) = 33.6 meters

your question SHOULD read: D is the distance from the finish line in KILOmetres. then the answer would be 33.6 km instead of 33.6 m

33.6 km is approximately 34 km

(I also suspect that t should be in HOURS not minutes and 2.4 should be hours.... this would give her a finish time of 5.45 HOURS for a marathon instead of 5.45 MINUTES !!! )