(1 point) a fish tank initially contains 15 liters of pure water. brine of constant, but unknown, concentration of salt is flowing in at 5 liters per minute. the solution is mixed well and drained at 5 liters per minute. a. let x be the amount of salt, in grams, in the fish tank after t minutes have elapsed. find a formula for the rate of change in the amount of salt, dx/dt, in terms of the amount of salt in the solution x and the unknown concentration of incoming brine c. dx grams/minute b. find a formula for the amount of salt, in grams, after t minutes have elapsed. your answer should be in terms of c and t. x(t)= grams c. in 10 minutes there are 25 grams of salt in the fish tank. what is the concentration of salt in the incoming brine? c = g/l

its 4 because 2 times 2 is 4, if you double the number two you get four

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: