Given the speeds of each runner below, determine who runs the fastest. \text{debbie runs 15 feet per second.} debbie runs 15 feet per second. \text{liz runs 112 feet in 11 seconds.} liz runs 112 feet in 11 seconds. \text{stephanie runs 1 mile in 411 seconds.} stephanie runs 1 mile in 411 seconds. \text{tony runs 581 feet in 1 minute.} tony runs 581 feet in 1 minute.

You are designing a rectangular pet pen for your new baby puppy. you have 30 feet of fencing you would like the fencing to be 6 1/3 feet longer than the width

Can someone tell me if this is perpendicular? !

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.