PLEASE HELP!!! Will give brainiest!
1 answer:
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Answer:
4 hours
Step-by-step explanation:
Since we know he travels at a rate of 1:7.5 all we have to do is divide 7.5 by 30. Do you use proportions? You can set this up as a proportion and the find answer easily.
1
Now we cross product.
7.5 multipled by x =7.5x
1x30=30
so now we have
7.5x=30
Now we have to divide 7.5 on both sides which gives us
x=4
Answer:
a.
Step-by-step explanation:
We are asked to find the probability of getting 3 heads on 4 flips.
Since we know that flipping a fair coin has 2 equally likely possible outcomes, so flipping four coins will have possible outcomes.
Sample space of possible outcomes.
HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT,
THHH, THHT, THTH,THTT, TTHH, TTHT, TTTH, TTTT.
We can see that there are 4 favorable outcomes of getting heads.
Therefore, the probability of getting 3 heads on 4 coins will be and option a is the correct choice.