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2 years ago

30inches increased by 30 percent

Mathematics

1 answer:

Blababa [14]2 years ago

3 0

30 * 0.30 = 9
30 + 9 = 39

30 increased by 30% = 39

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The record low temperature for a town is -13F. Yesterday, it was 6F. What is the difference between the absolute values of these

Keith_Richards [23]

Answer:

Step-by-step explanation:

We know that absolute values are the non negative equivalents to a negative. For instance, -8's absolute value is 8. In the question, you are being asked what the difference is. If we do a simple equation: 13 - 6 = 7, we get the answer.

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1 year ago

Sum of two numbers is 38, one number is 36 more than the other. find the numbers

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2 years ago

Read 2 more answers

The temperature, H, in degrees Celsius, of a cup of coffee placed on the kitchen counter is given by H = f(t), where t is in min

Deffense [45]

Answer:

f'(t) is negative

The unit is degC/min

At 35 minutes after the coffee was put on the counter, its temperature is 68 and will decrease by about 0.75 in the next 30 seconds.

Step-by-step explanation:

From the question we are told we are told that

The equation for the temperature of a cup of coffee place on a counter is

$H= f(t)$

Here t is the time in minutes the coffee was put on the counter

Generally f(t)' is the derivative of f(t) at it represents the change of the temperature of the cup of coffee with respect to time

Generally for the coffee placed on the counter after a couple of minutes the temperature will decrease hence f(t)' is negative

Generally the unit of the temperature is in degrees Celsius while that of time is in minutes

So the change in temperature with time f(35)' will be in degrees Celsius/minutes (i.e degC/min)

From the question we are told that

$|f(35)'| = 1.5$

i.e the rate of change of temperature after 35 minutes is 1.5

and

$|f(35)| = 68$

i.e the temperature of the cup of coffee after 35 minutes is 67 degC

Now after another t= 30 seconds = $\frac{30}{60}= 0.5 \ minutes$ the rate of change of the temperature of the cup of coffee is

$R = |f(35)'| * t$

=> $R = 1.5 * 0.5$

=> $R = 0.75$

At 35 minutes after the coffee was put on the counter, its temperature is 68 and will decrease by about 0.75 in the next 30 seconds.

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2 years ago

F(x) = -3x – 2 g(x) = 2x + 5 Find (f*g)(5)

antiseptic1488 [7]

Answer:

hope it will help u in understanding

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2 years ago