The height of a projectile fired upward with an initial velocity of 240 feet per second is given by the formula
?
?
where h is the height in feet and t is the time in seconds. Find the time required for the projectile to return to earth.
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Please enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).
20
Mathematics
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Find the intervals on which the function is continuous.y = 
- 
A. (-?, -7), (-7, -3), (-3, ?) B. (-?, -10), (-10, ?) C. (-?, ?) D. (-?, -3), (-3, ?)
Mathematics
Find an equation of a parabola satisfying the given conditions.Focus at (-5, -3), directrix y = 11
A. (y + 5)2 = -28(x + 4) B. (x + 5)2 = -28(y - 4) C. (y + 5)2 = -28(x - 4) D. (x + 5)2 = -28(y + 4)
Mathematics
Solve the problem.An auto repair shop charged a customer $384 to repair a car. The bill listed $54 for parts and the remainder for labor. If the cost of labor is $55 per hour, how many hours of labor did it take to repair the car?
A. 6.5 hr B. 6 hr C. 5 hr D. 7 hr
Mathematics
If an argument reads:
Mathematics