Answer:
44 mph
Step-by-step explanation:
Given that:
Before lunch :
Time taken = 2hrs ; at speed = x mph
After lunch :
Time taken = 3hrs ; at speed = x + 10 mph
Total distance covered = 250 miles :
Distance = speed * time
(2 * x) + (3 * (x + 10)) = 250
2x + 3x + 30 = 250
5x + 30 = 250
5x = 250 - 30
5x = 220
x = 220/ 5
x = 44 mph
Rate before lunch is 44mph
Answer:

Step-by-step explanation:
Step 1
List the length of the wingspan of the five butterflies

Step 2:
The two butterflies with the shortest wingspan has a wing length of
inches each.
Step 3:
Total length of the wingspan of the two butterflies with the shortest wingspan
= 
Final answer:
= 
Answer:
4 stations
Step-by-step explanation:
If we need to be at least 98% certain that an enemy plane flying over will be detected by at least one station, we must ensure that there is at most a 2% chance that no radar stations detect the plane.
The probability that a single radar station does not detect the plane is 0.35.
For n radar stations:

Rounding up to the next whole station, at least 4 stations are needed.
The answer is C. Circle
Hope this helps :)
Answer:
b
Step-by-step explanation:
make a formula, its the easiest way to solve problems like these also its very efficent