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victus00 [196]
3 years ago
5

A bar of metal is cooling from 1000°C to room temperature, 24°C. The temperature, H, of the bar t minutes after it starts coolin

g is given, in oc, by H = 24 + 976e-0.1t
(a) Find the temperature of the bar at the end of one hour. (Round your answer to the nearest degree.)
(b) Find the average value of the temperature over the first hour. (Round your answer to the nearest degree.)
(c) Is your answer to part (b) greater or smaller than the average of the temperatures at the beginning and the end of the hour? The answer to part (b) isecthan the average of the temperatures at the beginning and the end of the hour, because the graph is concave
Mathematics
1 answer:
motikmotik3 years ago
7 0

Answer:

ggfddv3=4

Step-by-step explanation:

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. In the U.S., from 2004−2015, the correlation coefficient for the relationship between the size of a cell phone data plan, x, a
bonufazy [111]

Answer: strong positive correlafion between data plan size 'x' and number of text messages sent 'y'

Step-by-step explanation:

'R' in statistics is used to denote correlation Coefficient. The correlation Coefficient is a value which ranges between -1 to +1. It tells us the level of relationship or correlation which exists between the relative movement of two variables, in this case the relationship between data plan size and the number of text messages sent in the US. R value of 0 depicts that no relationship exists between the two variables, R value closer the R value is to +1 and - 1 depicts the strength of positive and negative correlation of the two variables respectively.

A R value of +0.97 in the context above, depicts a strong positive correlation between data plan size and number of text messages sent in the US. That is large data size usually corresponds to large number of text messages and vice versa.

4 0
3 years ago
The eighth-grade class is planning a trip to Washington, D.C. this spring. They need a minimum of
Hoochie [10]

Answer:

There needs to be 174 Students in the 8th grade class.

Step-by-step explanation:

173(1/3) is 58

58+17=75

3 0
2 years ago
What is the completely factored form of x4 + 8x2 – 9? (x + 1)(x – 1)(x + 3)(x + 3) (x+1)(x+1)(x+3){x^2+9} (x2 – 1)(x + 3)(x – 3)
Y_Kistochka [10]

Answer:

(x+1)(x-1)(x^2+9)

Step-by-step explanation:


5 0
3 years ago
how do I solve subtract 19 from My number and mulitply the difference by -4 , the result is -44 What is Sara number​
Lera25 [3.4K]
Saras number is 396 - 997 - 239 oop
5 0
3 years ago
Find f (8) when f (x)=-26/x+7
otez555 [7]

Answer:

-26/8+7=15/4 or 3 3/4

Step-by-step explanation:

3 0
3 years ago
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