Answer:
The answer is the one at the bottom because the others don't make sense
Step-by-step explanation:
Answer:
Third option is correct.
Step-by-step explanation:
The given model is
Where, h(t) is heigth of rock after time t (in seconds).
The initial height of rock is 124 ft.
The leading coefficient is negative. It means it is a downward parabola.
First we have to the x-intercepts of the function.
Using quadratic formula, we get
and
It means rock remains in the air between .
The value of t can not be negative, therefore rock remains in the air between .
Third option is correct.
11a. I can't show the workings because I don't have pie on my keyboard. am so sorry but number 11a's answer is 6
11b = 10
Step 1: 25% = 1/4 Turn the percent into a fraction
Step 2: 10.99 x 1/4 Multiply the discount
Step 3: 2.75 Get the amount that will be discounted
Step 4: 10.99 - 2.75 Subtract the total cost by the discount.
Answer: $8.24
Answer:
y=10
Step-by-step explanation:
2+2-2+8=10