Acell phone company is trying to find a waterproof cell phone case to add to its product line. company managers know that plastic and silicone will be used. they also know that the depth of the water—less than five feet, between five feet and 20 feet, and more than 20 feet—affects the waterproof case. an experiment will compare all combinations of these choices. the cell phones will be subjected to each treatment, with one group dropped in water without a case, and all phones will be scored for quality. what is the control?
cell phones in the plastic case
cell phones in the silicone case
cell phones in the plastic case dropped in water less than five feet deep
cell phones in the silicone case dropped in water more than 20 feet deep
cell phones with no case

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²

where is the graph, sweetheart?

step-by-step explanation: