He can make a 70 or higher to keep a B avg.
a) I have attached an image of a probability tree diagram.
b) 0.02332 (please round to where you need)
The probability that Terri chooses a blue pen is 2/7. The probability that Terri chooses a red pen is 4/7. The probability that Terri chooses neither a red nor blue pen is 1/7.
2/7 x 4/7 x 1/7 = 0.02332
Hope this helps! :)
Answer:
-3 the reaction force will be 3, the net force will have to add up to 0.
Step-by-step explanation:
5x•8y
5•8=x•y
40=x•y
5•40•8•40=
40•(5+8)
40•13=
=520