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1 answer:
<u>Answer:</u>
−12 ÷ 4 expression best shows the temperature change each hour. Hence Option C is correct
<u>Solution:</u>
Given that, the temperature has been going down at a constant rate.
In 4 hours it went down by 12 degrees.
Now, we have to choose the correct option which best describes about the change in temperature for each hour.
Now, we know that, 12 degrees decreased in 4 hours.
Then, number of degrees decreased in one hour =
Number of degrees changed in one hour =
Because the temperature is decreasing we have to add a (-) symbol before the change in degrees.
So, now, <em>number of degrees changed in 1 hour </em>=
Hence, the correct option is option c.
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Answer:
The number of minutes she can continue to descend if she does not want to reach a point more than 144 feet below the ocean surface is <u>at most 5 minutes.</u>
Step-by-step explanation:
Given:
Initial depth of the scuba dive = 19 ft
Rate of descent = 25 ft/min
Maximum depth to be reached = 144 ft
Now, after 't' minutes, the depth reached by the scuba dive is equal to the sum of the initial depth and the depth covered in 't' minutes moving at the given rate.
Framing in equation form, we get:
Total depth = Initial Depth + Rate of descent × Time
Total depth =
Now, as per question, the total depth should not be more than 144 feet. So,
Solving the above inequality for time 't', we get:
Therefore, the number of minutes she can continue to descend if she does not want to reach a point more than 144 feet below the ocean surface is at most 5 minutes.