Simplify 7^2 • 7^6 =
1 answer:
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Answer: The sensor will read 300 liters after 5 minutes.
The sensor sensor should have read 120 liters at time -7 minutes.
Step-by-step explanation:
Given: The amount of water detected by sensor initially= 225 litres
Since, the hose fills the aquarium at a constant rate of 15 liters per minute.
Let x be the time , and y be reading of sensor then
Therefore, the sensor reads after 5 minutes (put x=5 in the equation)=
To find the sensor read at time -7 minutes put x=-7 in the equation, we get
Hence, the sensor should have read 120 liters at time -7 minutes.
Answer:
The most cost-effective company is Painting USA .
Step-by-step explanation:
Given as :
The charges applied by the Painting USA = $ 75 + $ 25 per hour labor charge
The charges applied by the Upscale Home Painting = $ 40 per hour
The total time required to paint the Paul's house = 25 hours
Now, Let the charges applied by the Painting USA = $ x
And charges applied by the Upscale Home Painting = $ y
So, x = $ 75 + $ 25 × 25 hour
Or, x = $ 75 + $ 625
∴ x = $ 700
So, The charges applied by the Painting USA = x = $ 700
And y = $ 40 × 25 hour
∴ y = $ 1,000
So , The charges applied by the Upscale Home Painting = y = $ 1,000
As $ 700 $ 1000
So, x y
Hence The most cost-effective company is Painting USA . Answer