Part A Suppose that you need to get a heavy couch into the bed of a pickup truck. (Figure 2) You know the bed of the truck is at a
height of 1.00 m and you need a ramp that makes an angle of 40° with the ground if you are to be able to push the couch.
Use the sine function to determine how long of a board you need to use to make a ramp that just reaches the 1.00-m high
truck bed at a 40° angle to the ground
Express your answer in meters to three significant figures.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?