Answer:
1.6 kg for 7.85 is better I believe.
Step-by-step explanation:
![\bf \stackrel{height}{h(t)}=-16t^2+32t+48\implies \stackrel{48~ft}{~~\begin{matrix} 48 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}=-16t^2+32t~~\begin{matrix} +48 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix} \\\\\\ 0=-16t^2+32t\implies 16t^2-32t=0\implies 16t(t-2)=0\implies t= \begin{cases} 0\\ 2 \end{cases}](https://tex.z-dn.net/?f=%5Cbf%20%5Cstackrel%7Bheight%7D%7Bh%28t%29%7D%3D-16t%5E2%2B32t%2B48%5Cimplies%20%5Cstackrel%7B48~ft%7D%7B~~%5Cbegin%7Bmatrix%7D%2048%20%5C%5C%5B-0.7em%5D%5Ccline%7B1-1%7D%5C%5C%5B-5pt%5D%5Cend%7Bmatrix%7D~~%7D%3D-16t%5E2%2B32t~~%5Cbegin%7Bmatrix%7D%20%2B48%20%5C%5C%5B-0.7em%5D%5Ccline%7B1-1%7D%5C%5C%5B-5pt%5D%5Cend%7Bmatrix%7D%20%5C%5C%5C%5C%5C%5C%200%3D-16t%5E2%2B32t%5Cimplies%2016t%5E2-32t%3D0%5Cimplies%2016t%28t-2%29%3D0%5Cimplies%20t%3D%20%5Cbegin%7Bcases%7D%200%5C%5C%202%20%5Cend%7Bcases%7D)
t = 0 seconds, when the ball first took off, and t = 2, 2 seconds later.
Answer:
x ≥-3
Step-by-step explanation:
7 − 9x − (x + 12) less than or equal to 25
7 − 9x − (x + 12) ≤ 25
Distribute the minus sign
7 − 9x − x - 12 ≤ 25
Combine like terms
− 10x −5 ≤ 25
Add 5 to each side
− 10x −5+5 ≤ 25+5
− 10x ≤ 30
Divide by -10. Remember that this flips the inequality
− 10x/-10 ≥30/-10
x ≥-3
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Explanation:</h2><h2>
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Hello! Remember you have to write complete questions in order to get good and exact answers. Anyway, I'll help you either way. A sector is a region of a circle between two radii. Let's assume the sector as:

Then, we can find the central angle by the following equation:

But:

Then:

Answer: Let's have the picture of the rectangle
Step-by-step explanation: