calculator problems

[smeag]

Please tell me how you got your answer for the rpn calculator and I appreciate your efforts.

At what latitude north of the equator is the average length of a time zone such as central time zone equal to 750 miles? (please answer in degrees)

what is the percent error in the value of cot38.9 obtained from linear interpolation between cot30 and cot40? (please answer in percent)

Gerald stands on the roof of a building at 125 ft above ground. He tosses a ball off the roof with an initial velocity of 30 mph. At what angle (straight out is 0, straight up is 90) must
he toss the ball if it hits the ground in exactly 3 seconds? (please answer in degrees)

HOw long after 7:41 do the hour hand and the minute hand of a clock make a 10 angle? (please answer in minutes)

Bob needs to paint a barn in 8 hr, but working alone takes 10hr. HOw long after starting the job should he bring in a second painter that works at 70% of bob's pace?

Solve arc csc x = e^ (-x/4) * Log(base8)(x) for pi<x<2pi

[88bobcat]

[calcguy]

It works on my HP35s like this: arcsin(1/x) = e^(-x/4) * Ln(x)/Ln(8) Use 1.5*pi for your starting value. I get 4.17 in a few seconds.

[88bobcat]