Delilah and a group of friends had excellent service at a restaurant. they would like to give the server a 25 percent gratuity on their $140 bill. use the diagram to identify the amount of the tip. using a diagram

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

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.