Answer:
1.5 km/hour
Step-by-step explanation:
d is the David's speed in still water
c is the speed of the current
Going with the current, he travels d+c km per hour.
Going against the current, he travels d-c km per hour.
d+c = (20 km)/(2.5 hours) = 8 km/hour
d-c = (20 km)/(4 hours) = 5 km/hour
Add the equations to eliminate the c terms
d+c = 8
d-c = 5
----------
2d = 13
d = 6.5 km/hour
c = 8-d = 1.5 km/hour
Three would fit cause 3 times 12 is 36 and 4 times 12 is 48 which would be too big
Answer:
38 students are not in the art club while 12 student are in the art club.
Step-by-step explanation:
Percent I am not exactly sure, I'm sorry, still I hope this somehow helped!
A
..
Z
Z
Z
Z
Z
Z
Z
Z
A
A
Answer is A
Answer:
A=60 inches by 72 inches
B=increased 600%
Step-by-step explanation:
Scale is 6 times bigger, so 12*6=72
A=60 inches by 72 inches
First painting perimeter: 10+10+12+12=44 inches
Second painting perimeter: 60+60+72+72=264 inches
264/44*100%=600%