Two independent, completely accidental scientific discoveries will be required to plan a space elevator. The first, Negative Gravity, we believe will take an average of 10 years to happen. The second, Monofilament Cables, we believe will take an average of 6 years to take place. c) What is the expected time until we can plan a space elevator, because both discoveries will have taken place? (Hint: remember the tail probability formula E(T) = $. (1 – F(T)dT.)

What constants do you need to add to each of the following quadratic equations to complete the square? 2x2 - 3x = 0 x2 - 8x = 0 2x2 - 11x = 18

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.