The correct answer is 75% increase.
The number 4 to 7 is increasing not decreasing since the number is higher than before.
Also 4 x 0.75 = 3 and 4 + 3 = 7 so it’s and increase of 75%
Hope this helps.
Answer:
<h2><em>
50.42m/s</em></h2>
Step-by-step explanation:
Average speed is the change in distance of a body with respect to time. This is expressed as:

Given the function of the height in metres expressed as y = 56t − 1.86t² and time interval [1,2]
t₁ = 1sec and t₂ = 2 secs
y(t₂) = 56t₂ − 1.86t₂²
y(2) = 56(2) − 1.86(2)²
y(2) = 112-7.44
y(2) = 104.56
y(t₁ ) = 56t₁ − 1.86t₁ ²
y(1) = 56(1) − 1.86(1)²
y(1) = 56-1.86
y(1) = 54.14
Substituting the derived value into the formula for finding the average speed:

<em>Hence, the average speed over the given time intervals. [1, 2] is 50.42m/s</em>
Answer:
9a-a^2 is the required quotient.
Step-by-step explanation:

Answer: B
Step-by-step explanation:
(4 x 20) + (4 x 4) - This can be simplified.
80 + 16 = 96
24 x 4 = 96
Therefore, B is correct.