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Anna35 [415]
3 years ago
11

A home improvement contractor is painting the walls and ceiling of a rectangular room. The volume of the room is 998.25 cubic fe

et. The cost of wall paint is $0.12 per square foot and the cost of ceiling paint is $0.18 per square foot. Find the room dimensions that result in a minimum cost for the paint. g

Mathematics
1 answer:
AlladinOne [14]3 years ago
6 0

Answer:

the room dimensions that result in a minimum cost for the paint is;

x = 11 ft

y = 11 ft

z = 8.25 ft

Step-by-step explanation:

Shown in the attachment;

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I am thinking of a number when I double my number and then subtract the resulting from I get -1 what is my number
igor_vitrenko [27]

Answer: 1

Step-by-step explanation:

-1 + 2 = 1 ????

4 0
3 years ago
A robot has a straight arm 20 inches long that can rotate about the origin of a coordinate system. If the robot’s hand is locate
scoundrel [369]

Answer:

The location of the robots hand after rotating 45° counterclockwise from (-20, 0) in inches is (-14.14, 14.14)

The location of the robots hand after rotating 45° clockwise from (-20, 0)) in inches is (-14.14, -14.14)

Step-by-step explanation:

The initial location of the robots hand = (-20, 0)

The angle through which the robot rotates his hand = 45°

∴ We have the length of the robots hand = 20 inches

We note that (-20, 0) is in the 2nd Quadrant

The location of the robots hand after rotating 45° counterclockwise = 135°

Therefore, the location of the robots hand after the rotation = (20×cos(135°), 20×sin(135°)) = (-10·√2, 10·√2) = (-14.14, 14.14)

The location of the robots hand after rotating 45° clockwise from (-20, 0) = 225°

Therefore, the location of the robots hand after the rotation = (20×cos(225°), 20×sin(225°)) = (-10·√2, -10·√2) = (-14.14, -14.14)

8 0
3 years ago
If Janet scored an 85% on her test she answered 34 questions correctly how many questions were on the test
Wittaler [7]
40 questions. You set up a proportion, mutiply 34 by a 100 and get 3400. Then you divide 3400 by 85 and you get ur answer. You could also try guessing by putting in random values you think are the whole number and multiplying them by 0.85. So if you guess 44 is the whole and try checking it by multiplying it by .85 and get a value thats higher than the value the percentage is equal to you try another smaller value. So if 44 doesn't work you can try 40. 40 times .85 is 34 so your answer of 40 questions is correct.
7 0
3 years ago
Can you help me to find the answer
const2013 [10]
He simplified expression C because that is the only one that has only multiplications.
4 0
3 years ago
Read 2 more answers
The price of a car has been reduced from $10,500 to $6,300. What is the percentage decrease of the price of the car ?
Alex73 [517]

Answer: A. 40%

Step-by-step explanation:

to find the percentage decrease, first you have to subtract $6,300 from $10,500, which equals $4,200. This is the amount decreased from the price of the car. Then, to find the percentage that $4,200 is to $10,500, you have to divide 4,200 by 10,500. This should give you 0.4, the percentage is this number multiplied by 100. This should give you the number 40, which means that the percentage decrease of the price of the car; 40%.

5 0
3 years ago
Read 2 more answers
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