Answer:
63.62
Step-by-step explanation: A=πr^2=π·4.52≈63.61725
Let r be the number of cards Ron has.
r + 2r + 4 = 97
3r + 4 = 97
3r + 4 - 4 = 97 - 4
3r = 93
3/3r = 93/3
r = 31
Ron has a total of 31 cards and Jason has a total of 66 cards.
Answer:
B: Yes, the participants are grouped by sun exposure, and then both treatments are randomly assigned within each group.
Step-by-step explanation:
Randomized block design is one in which the experimental units are categorized into groups which we call blocks. Thereafter, treatments will be randomly allocated to the experimental units inside each of the blocks.
Now, from the question, we can see that they were grouped in Blocks according to their outdoor activity which is degree of exposure to the sun. Thereafter the individual groups are randomly assigned treatments.
Thus, Option B is correct.
A:
2 inches - 25 miles
x inches - 60 miles
Set up a proportion:

4.8 inches on the map represent 60 miles.
B:
2 inches - 25 miles
1/4 inches - x miles
Set up a proportion:

3.125 miles are represented by 1/4 inches on the map.
Answer:
X=-1.25
Step-by-step explanation:
<u>Y=-5.6X-7</u>
To find X-INTERCEPT/ZERO substitute y=0
<u>0=-5.6x-7</u>
<u>Move</u> the <u>VARIABLE</u> to the left-handed side and change it's sign
<u>5.6x=-7</u>
<u>Divide both sides</u> of the equation by 5.6
<u>x=-1.25</u>
Which gives you: x=-1.25
Alternative Form:
x=-5/4x=-1^1/4