The probability of her choosing a green marble is 5/20
I’m not sure about the other part of the question.
Hope this helps you a little bit :)
Answer: 29 cows
Step-by-step explanation:
First we need to know how many pieces of meat will be needed. But before that, we need to know how many hours are in these 30 days. 24 hours per day so, 30*24=720 hours. 720 hours and 4 pieces of meat per 10 of those hours. We can do 720/10=72, then, 72*4=288. That means we need 288 pieces of meat, if each cow gives you ten, then we can round 288 to the nearest ten which is 290, then, 290/10 is 29. This means that Dumbledore needs 29 whole cows.
<em>(Yer a wizard Harry)</em>
John can walk 4 miles per hour
As you know, it is a straight angle, which measures 180°.
1 angle is 70°
180 - 70 = 120
The angles are have the same measure since both are angle x
Divide by 2 to get x
120 ÷ 2 = 60
x° = 60°
Hope this helps :)
Answer: 1/256
Step-by-step explanation:
You can take out the negative in the exponent by flipping the numerator and denominator to get . Then simplify to get .