Answer:
<u>C and D</u>
Step-by-step explanation:
<u>D.</u> A negative times a positive gives you a negative, so the first 2 fractions will still be negatives after they get out of the parenthesis
<u>C.</u> The 4/7 and -4/7 cancel out
Answer:
8.5 x 10 ^4 for 85 000
6.7 x 10 ^-6 for 0.0000067
The area of the circle is given as:

Plugging the value of the radius we have that:

Therefore the area in terms of pi is:
To find how much she needs of every ingredient, multiply every ingredient by 2/3.
Butter: 2•2/3=4/3=1&1/3 cups
Marshmallows: 24•2/3=16 oz
Cereal: 13•2/3= 26/3=8&2/3 cups
If he failed it once, then the probability out of two times is 1/2. He has a 50% chance of failing the drug test again.
I hope this helps!