Convert. When necessary, round the answer to two decimal places.80 quarts =    gallons

A. 320
B. 160
C. 40
D. 20


Answer: D

Mathematics

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Provide an appropriate response.Solve the equation: 8x = 6

A. x = 
B. x = 2
C. x = -2
D. x = 

Mathematics

Provide an appropriate response.Which of the following are not allowable operations when the Gaussian elimination method is used to solve a system of linear equations?(i)A multiple of elements of one row may be added to the corresponding elements of any other row.(ii)Any two columns may be interchanged.(iii)The elements of any row may be multiplied by the corresponding elements of another row.(iv)All of the elements of any row may be multiplied by any nonzero number.

A. (i), (iv) B. (ii), (iii) C. (ii), (iii), (iv) D. (ii)

Mathematics

Solve the problem.To remodel a bathroom, a contractor charges $30 per hour plus material costs, which amount to $4740. Therefore, the total cost to remodel the bathroom is given by  where x is the number of hours the contractor works. Find a formula for  What does  compute?

A. f -1(x) =  - 4740; This computes the number of hours worked if the total cost is x dollars.
B. f -1(x) =  - 158; This computes the number of hours worked if the total cost is x dollars.
C. f -1(x) =  - 4740; This computes the total cost if the contractor works x hours.
D. f -1(x) =  - 158; This computes the total cost if the contractor works x hours.

Mathematics

Solve the problem.A rumor spreads through a community of 800 people at the rate   = 0.1(800 - N)N1/2where N is the number of people who have heard the rumor at time t (in hours). Use Euler's method with h = 0.5 to find the number who have heard the rumor after 1.5 hours, if 1 person heard it initially.

A. about 711 people B. about 681 people C. about 702 people D. about 719 people

Mathematics