Answer:
Phrases 2 and 4.
Step-by-step explanation:
6.5x+1.5<21
The sum of 1.5 and the product of 6.5 and a number is no greater than 21.
The product of 6.5 and a number, when increased by 1.5 is at most 21.
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(FROM CROSS)
Answer:
Therefore the approximate area of this clock face is 415.3 feet².
Step-by-step explanation:
Given:
Clock is of Circular Shape,
Diameter = 23 feet

To Find :
Area of Clock Face = ?
Solution:
Area of Circle having Radius 'r' is given as,

Substituting the values we get

Therefore the approximate area of this clock face is 415.3 feet².
Answer:

Step-by-step explanation:
we have

we know that

In this problem

substitute in the formula


Answer:
Step-by-step explanation:
Average Temperatures Suppose the temperature (degrees F) in a river at a point x meters downstream from a factory that is discharging hot water into the river is given by
T(x) = 160-0.05x^2
a. [0, 10]
For x = 0
T(0) = 160 - 0.05 × 0^2
T(0) = 160
For x = 10
T(10) = 160 - 0.05 × 10^2
T(10) = 160 - 5 = 155
The average temperature
= (160 + 155)/2 = 157.5
b. [10, 40]
For x = 10
T(10) = 160 - 0.05 × 10^2
T(10) = 160 - 5 = 155
For x = 40
T(10) = 160 - 0.05 × 40^2
T(10) = 160 - 80 = 80
The average temperature
= (80 + 155)/2 = 117.5
c. [0, 40]
For x = 0
T(0) = 160 - 0.05 × 0^2
T(0) = 160
For x = 40
T(10) = 160 - 0.05 × 40^2
T(10) = 160 - 80 = 80
The average temperature
= (160 + 80)/2 = 120