To determine the time it takes for the maximum height to be achieved, derive the equation and equate to zero.
h = -16t² + 112t + 30
dh / dt = 0 = 2(-16)t + 112
The value of t is 3.5 s. Substitute this value of time to the equation for h,
h = -16 x (3.5 s)² + 112 x 3.5 s + 30 = 226 ft
Thus, the answer is letter D.
cos (θ) = adj/hyp
cos (70) = 25/x
x cos (70) = 25
x = 25/cos(70)
x = 73.10 m (nearest hundredth)
Answer: 73.10 m
Option A: 1467*(2+3) is correct
Further explanation:
Given
Total number of people on train = 1467
Small bags per person = 3
Big bags per person = 2
As there are 1467 people on train and each person has(2+3) bags, total bags on train will be:
So, option A is correct.
Keywords: Operators, Operator precedence
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15t + <35> j (price * count sold)
Cost = <4.5>t + 5 j + 150
Profilt = Revenue - Cost = (15t + <35>j) - (<4.5>t + 5j + 150)
= 15t + <35>j - <4.5>t < - >5j - 150
= 50t - -9.5j - 150
Distance = speed*time
time = 43 minutes = 0.72 hrs
distance = 1.4 miles
speed = distance/time = 1.4/0.72 = 1.94 miles/hour.