I need help on number four (4) please

Mathematics

2 answers:

nataly862011 [7]3 years ago

7 0

67% of 850 people surveyed.

To find the percentage you multiply it:
850 * 67% = answer
850 * 67% = 569.5

So the answer would be 569.5 , but you can't get .5 of a person. So you round, the answer is is 570.

MatroZZZ [7]3 years ago

7 0

The answer is 569.5 or 570

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You bike 1 mile the first day of your training, 1.3 miles the second day, 1.9 miles the third day, and 3.1 miles the fourth d

JulsSmile [24]

Answer:

19.9 miles

Step-by-step explanation:

In this problem we have:

$d_1=1 mi$ is the distance travelled during the 1st day

$d_2=1.3 mi$ is the distance travelled during the 2nd day

$d_3=1.9 mi$ is the distance travelled during the 3rd day

$d_4=3.1 mi$ is the distance travelled during the 4th day

We notice that the difference between the distance travelled on the (n+1)-th day and the distance travelled on the n-th day doubles every day. In fact:

$d_2-d_1=0.3\\d_3-d_2=2\cdot 0.3 = 0.6\\d_4-d_3=2\cdot 0.6 = 1.2$