The time it takes to charge the battery of a cell phone is directly proportional to the charge of the battery. The equation, y = 0.21x, is used to approximate the time it takes to charge the battery of a cell phone. Approximate how long it will take the battery to charge to 100%.
https://dw6y82u65ww8h. cloudfront. net/organisations/328/3bf698cd-1ea0 -4cb4-a7a2-bdb57706cad2/img_battery _charge. gif

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct

Which of the following circles have their centers on the x-axis? check all that apply.