60% of total = 408 —> 408/.60 —> 680
Answer:
Approximately 13 miles
Step-by-step explanation:
First, multiply the amount of Snickers bars eaten by the amount of calories a single Snickers bar is worth:
4 * 215 = 860
4 Snickers bars is worth 860 calories.
Now that we know the amount of calories 4 Snickers bars is worth, divide that amount by the amount of calories burned per mile walked:
860 ÷ 65 ≈ 13.23
You would have to walk approximately 13 miles to burn off the calories from 4 Snickers bars.
B for sure but I don't know why just trust me.
P(<em>X</em> ≤ 65) = P((<em>X</em> - 79)/7 ≤ (65 - 79)/7) = P(<em>Z</em> ≤ -2)
where <em>Z</em> follows the standard normal distribution with mean 0 and standard deviation 1.
Recall that for any normal distribution with mean <em>µ</em> and s.d. <em>σ</em>, we have
P(|<em>X</em> - <em>µ</em>| ≤ 2<em>σ</em>) ≈ 0.95
which in the case of <em>Z</em> translates to
P(-2 ≤ <em>Z</em> ≤ 2) ≈ 0.95
Now,
P(-2 ≤ <em>Z</em>) + P(-2 ≤ <em>Z</em> ≤ 2) + P(<em>Z</em> ≥ 2) = 1
==> P(-2 ≤ <em>Z</em>) + P(<em>Z</em> ≥ 2) ≈ 0.05
Any normal distribution is symmetric about its mean, so P(-2 ≤ <em>Z</em>) = P(<em>Z</em> ≥ 2), and this gives us
==> 2 P(-2 ≤ <em>Z</em>) ≈ 0.05
==> P(-2 ≤ <em>Z</em>) ≈ 0.025
Answer:
#4 - y= 1/2x-2 #5- y=1/3x+3
x y x y
0 -2 0 3
2 -1 3 4
4 0 6 5
6 1 9 6
Step-by-step explanation:
Hope that helped :)