<h3>
Answer: 17%</h3>
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Explanation:
The change in value is 30-25 = 5, so the amount has dropped by 5
Divide this change over the original amount to get 5/30 = 0.1667 approximately. This converts to 16.67% roughly, and that rounds to 17%
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Here's a way to do it using a formula
A = old value = 30
B = new value = 25
C = percent change
C = [ (B-A)/A ] * 100%
C = [ (25-30)/30 ] * 100%
C = -0.1667 * 100%
C = -16.67%
C = -17%
The negative percent change means we have a percent decrease. The class size went down by about 17%.
1. This is an exponential function with general form
. It passes through (0, 3), (1, 6), and (2, 12). It starts at y = 3, so a = 3. For every 1 unit increase in x, the y-value doubles, so b = 2. Therefore, the equation for this graph is
.
2. Since b = 0.42 (which is < 1), this is decaying. The multiplier is -3. The function is decreasing by 58% (1 - 0.42 = 0.58). This is shifted 16 units to the left (the exponent is x + 16), and 9 units down.
3.
Answer:
Bus charges for 30 people = $98
Step-by-step explanation:
Given:
Car A charges for 2 people = $14
Car B charges for 4 people = $20
Van charges for 8 people = $32
Find:
Bus charges for 30 people
Computation:
Assume;
Fix charge = b
Variable charges = a
So,
2a + b = 14.................................. Eq 1
4a + b = 20 ..............................Eq2
From Eq 1 and 2
a = 3
Variable charges = $3
Fix charge = 8
So,
Bus charges for 30 people = 30a + b
Bus charges for 30 people = 30(3) + 8
Bus charges for 30 people = $98
Answer:
10/21
Step-by-step explanation:
Number of minutes required for printing 21 pages: 10
So, number of minutes required for printing 1 page
= 10/21
<em>(= 0.47 = 0.5 [approximately])</em>
