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3 years ago

What is the absolute value of -90?

Mathematics

2 answers:

dalvyx [7]3 years ago

7 0

Answer:

The absolute value of -90 is 90

Step-by-step explanation:

-90 is 90 away from 0.

Alexandra [31]3 years ago

3 0

Answer: 90

Step-by-step explanation:

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If a cup of coffee has temperature 97Â°C in a room where the ambient air temperature is 25Â°C, then, according to Newton's Law o

FinnZ [79.3K]

Answer:

The average temperature is $T_{a} = 81.95^oC$

Step-by-step explanation:

From the question we are told that

The temperature of the coffee after time t is $T(t) = 25 + 72 e^{[-\frac{t}{45} ]}$

Now the average temperature during the first 22 minutes i.e fro $0 \to 22$ minutes is mathematically evaluated as

$T_{a} = \frac{1}{22-0} \int\limits^{22}_{0} {25 +72 e^{[-\frac{t}{45} ]}} \, dx$

$T_{a} = \frac{1}{22} [25 t + 72 [\frac{e^{[-\frac{t}{45} ]}}{-\frac{1}{45} } ] ] \left| 22} \atop {0}} \right.$

$T_{a} = \frac{1}{22} [25 t - 3240e^{[-\frac{t}{45} ]} ] \left | 45} \atop {{0}} \right.$

$T_{a} = \frac{1}{22} [25 (22) - 3240e^{[-\frac{22}{45} ]} - (- 3240e^{0} )]$

$T_{a} = \frac{1}{22} [550 - 1987.12 + 3240]$

$T_{a} = 81.95^oC$

8 0

3 years ago

Complete the table using the relationship between q and t.

kati45 [8]

T will always be q + 20, because she always talks for 20 minutes.

Q = 2, T = 22
Q = 4 T = 24
Q = 6. T= 26
Q = 8, T=28

3 0

3 years ago

Samuel drove 84 miles in 6 hours. How far can he drive in 6 hours?

rosijanka [135]

Answer:

the answer is 84 being how you asked the question but I dont think thats what you meant to ask. if thars wrong just tell me and ill answer it the way you need it

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

100 POINTS PLEASE HELP ASAP!!!!!

UkoKoshka [18]

The two numbers are 31 and 35.

Step-by-step explanation:

Let,

one number = x

2nd number = y

According to statement;

x+y=66 Eqn 1

y=x+4 Eqn 2

Putting y=x+4 from Eqn 2 in Eqn 1;

$x+(x+4)=66\\x+x+4=66\\2x=66-4\\2x=62\\Dividing\ both\ sides\ by\ 2\\\frac{2x}{2}=\frac{62}{2}\\x=31\\Putting\ x=31\ in\ Eqn\ 2\\y=31+4\\y=35$

The two numbers are 31 and 35.

Keywords: Linear equation, Addition

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago

Please help me solve for13 and 14

deff fn [24]

Answer:

13. A

14. True

Step-by-step explanation:

The months cancel out because they are the same unit in the right positions, and all you have to do for the second one is multiply

4 0

3 years ago