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A firefighter aim a fire hose from 4 feet above the ground at a window that is 26 feet above the ground. The equation h=-0.01d^2+1.06d+4 models the path of the water when h equals height in feet. Estimate, to the nearest whole number, the possible horizontal distances (d) in feet between the firefighter and the building.
been out of school for a while and can remember how to do this. if cant give the answer, instructions on how to would be much appreciated.
Find the 99% confidence interval
Complex problems
Suppose you wish to build a spa on a wood deck. The deck is to be built 4 ft above level ground. It is to be 50 ft by 30 ft and is to contain a spa that is circular with a 14-ft diameter. The spa is 4 ft deep.
A ship travels 50 km on a bearing of N27°E. It then makes a left turn of 90° and travels for 140 km. Find the bearing of the ship to the starting point. Round the answer to one decimal place.
A manufacture has been selling 1200 television sets a week at $420 each. A market survey indicates that for each $17 rebate offered to a buyer, the number of sets sold will increase by 170 per week. How would you find out the rebate that would max..
How quickly is the distance between the ships changing at midnight?
How large a sample size will need to be selected if we wish to have a 95% confidence interval that is accurate to within 1%.
A water trough is 10m long and a cross-section has the shape of an isosceles trapezoid that is 30cm wide at the bottom, 80 cm wide at the top and has height of 50 cm. if the trough is being filled with water at the rate of 0.2 m^3/min, how fast is..
A plumber charges customers 48 dollars for each hour worked plus an additionaly 9 dollars for travel. If h represents the number of hours worked. what would be the equation used to calculate the plumbers total charge in dollars?
Solving problems on permutation and combination
A football is thrown downward from a window in a tall building. Its position at time t in seconds is s=16t^2+32t, where s is in feet. How long to the nearest tenth will it take the ball to fall 175 feet?
Graph the population function and estimate the time for the population to reach 120,000. (Give your answer to the nearest hundredth.)
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