I would use a proportion:
336 miles/7 hours = x miles/15 hours (cross multiply)
x= 720 miles
Answer:
225 m²
Step-by-step explanation:
If W is the width of the rectangle, and L is the length, then:
60 = 2W + 2L
A = WL
Use the first equation to solve for one of the variables:
30 = W + L
L = 30 − W
Substitute into the second equation:
A = W (30 − W)
A = 30W − W²
This is a parabola, so we can find the vertex using the formula x = -b/(2a).
W = -30 / (2 × -1)
W = 15
Or, we can use calculus:
dA/dW = 30 − 2W
0 = 30 − 2W
W = 15
Solving for L:
L = 30 − W
L = 15
So the maximum area is:
A = WL
A = (15)(15)
A = 225
Answer:
0.0555555556
Step-by-step explanation:
Answer:
Option B
Step-by-step explanation:
Time taken by Nathan to completethe task = 4 hours
Time taken by Elijah to complete the task = 3 hours
They work together to complete the work
≈ 1.7 hours
