Answer:
First one
Step-by-step explanation:
Answer:
![\bold{1) 2 \frac{2}{5} hours} \\ 2)36 \: hours}](https://tex.z-dn.net/?f=%20%5Cbold%7B1%29%20%202%20%5Cfrac%7B2%7D%7B5%7D%20%20%20hours%7D%20%5C%5C%202%2936%20%5C%3A%20hours%7D)
Step-by-step explanation:
<h3>to understand this</h3><h3>you need to know about:</h3>
<h3>let's solve:</h3>
in 4 hours Maria weve 1 basket
in 1 hour Maria weve ¼ basket
in 6 hours Ju lia weve 1 basket
in 1 hour J ulia weve ⅙
in 1 hour Maria and J ulia can weve
![\sf \frac{1}{4} + \frac{1}{6} \\ \sf = \frac{6 + 4}{24} \\ = \sf \frac{10}{24} \\ \sf \frac{5}{12}](https://tex.z-dn.net/?f=%20%5Csf%20%5Cfrac%7B1%7D%7B4%7D%20%20%2B%20%20%5Cfrac%7B1%7D%7B6%7D%20%20%5C%5C%20%20%5Csf%20%20%20%3D%20%5Cfrac%7B6%20%2B%204%7D%7B24%7D%20%20%5C%5C%20%3D%20%20%20%5Csf%20%20%5Cfrac%7B10%7D%7B24%7D%20%20%5C%5C%20%5Csf%20%20%5Cfrac%7B5%7D%7B12%7D%20)
basket can be weved in 1 hour by Maria and J ulia
1 basket can be weved in
![\sf 1 \div \frac{5}{12} \\ \sf 1 \times \frac{12}{5} \\ \sf2 \frac{2}{5} \: hours](https://tex.z-dn.net/?f=%20%5Csf%201%20%5Cdiv%20%20%5Cfrac%7B5%7D%7B12%7D%20%20%5C%5C%20%20%5Csf%201%20%5Ctimes%20%20%5Cfrac%7B12%7D%7B5%7D%20%20%5C%5C%20%20%5Csf2%20%5Cfrac%7B2%7D%7B5%7D%20%20%5C%3A%20%20hours%20)
by Maria and J ulia
therefore
15 basket can be weved in
![\frac{12 \times 15}{5} \\ 12 \times 3 \\ 36 \: hours](https://tex.z-dn.net/?f=%20%5Cfrac%7B12%20%20%5Ctimes%2015%7D%7B5%7D%20%20%5C%5C%2012%20%5Ctimes%203%20%5C%5C%2036%20%5C%3A%20%20hours)
Answer:
P = 3x + 7
Step-by-step explanation:
The perimeter (P) is the sum of the 3 sides of the triangle, that is
P = x + 5 + x + 4 + x - 2 ← collect like terms
= 3x + 7
Starting with N = N₀·(1+r)^(t/4)
where N is the number of bacteria at t hours, r is the growth rate, and N₀ is the initial number of bacteria
N₀ = 64
r = 50% = 0.5
So the formula is:
N = 64 · (1+0.5)^(t/4)
N = 64·(1.5)^(t/4)
So after 100 hours,
N = 64 · (1.5)²⁵ = 1.6×10⁶
There are 1.6×10⁶ bacteria at 100 hours.
The answer should be the second one