Solve.A projectile is fired upward from the ground with an initial velocity of 400 feet per second. Neglecting air resistance, the height of the projectile at any time t can be described by the polynomial -16t2 + 400t. Find the height of the projectile at t = 8 seconds.
A. 2176 ft
B. 3200 ft
C. 2276 ft
D. 3072 ft
Answer: A
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Given the functions f(x) and g(x), find the appropriate sum or difference function.f(x) = -10x4 + 5x2 + x and g(x) = 9x4 - 5x3 + 2x2 - 9Find f(x) - g(x).
A. f(x) - g(x) = -19x4 - 5x3 + 3x2 + x - 9 B. f(x) - g(x) = -19x4 + 5x3 + 3x2 + x + 9 C. f(x) - g(x) = x4 - 5x3 + 7x2 + x - 9 D. f(x) - g(x) = -x4 + 5x3 + 7x2 + x + 9
Use the unit circle to determine the value of the given expression or state that it is undefined.sec (-90°)
A. -1 B. 1 C. 0 D. undefined
Solve the equation.-3a + 5 + 4a = 15 - 29
A. 19 B. -19 C. 49 D. -49
Solve the problem.On a recent trip, Sarah's car traveled 20 mph faster on the first 130 miles than it did on the remaining 80 miles. The total time for the trip was 4 hr. Find the speed of Sarah's car on the first part of the trip.
A. 62 mph B. 10 mph C. 42 mph D. 39 mph