A skateboarder is jumping down a set of stairs. Assume the stairs are above the ground by h = 3.94 m, and are l = 3.15 m long. The skateboarder is heading toward the top of the stairs with a speed of 9.15 m/s, and they simply roll off the top - no jumping in the air. How far from the bottom of the stairs will they land?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.