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ehidna [41]
3 years ago
8

Sam is writing a report on cell phone usage. he collects data from a random sample of eight graders in his school, and finds tha

t 18 out of 20 eight graders have cell phones. if there are 310 eight graders in his school,estimate the number of eighth graders who have cell phones.
Mathematics
1 answer:
nataly862011 [7]3 years ago
4 0
Answer is 279 exact but estimated is 280
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Which of the following shows how to write 8,240 pennies as<br> dollars?
olasank [31]

Answer:

$ 82.40

Step-by-step explanation:

you divide

100 pennies in a dollar

8240/100=82.40

5 0
3 years ago
A phone company charges a $4 monthly service fee and $0.25 for every minute of long-distance call time. If your telephone budget
Semmy [17]
Assuming it's the amount of minutes you can call per month:
9.48 - 4 is 5.48
5.48 ÷ 0.25 is 21 point something. Since you have to round down, 21 minutes is the Max amount of time you can call.
7 0
4 years ago
Find the area of the triangle<br> A)<br> B)<br> 09<br> 11 ft2<br> D)<br> 224²
Romashka-Z-Leto [24]

Answer:

A

Step-by-step explanation:

Area of a triangle = \frac{bh}{2}

where b = base length and h = height

the triangle shown has a base length of 2 and 1/2 and a height 4. and 2/5

So area =

\frac{2\frac{1}{2} *4\frac{2}{5} }{2} \\\\2\frac{1}{2} *4\frac{2}{5} =11\\\\\frac{11}{2} =5.5

5.5 also = 5\frac{1}{2}

Hence, the correct answer is A

7 0
3 years ago
Look at the picture please
Goshia [24]
No it’s not that’s the wrong answer
3 0
3 years ago
For this item, any answers that are not whole numbers should be entered as a decimal, rounded to the tenths place. Brian's schoo
LenaWriter [7]

Answer:

  1. The probability that the locker code begins with a prime number is 40%.
  2. The probability that the last digit of the locker code is an odd number is 40%

Step-by-step explanation:

  1. Prime numbers are the numbers that only divide with 1 or itself. So in this case it is 5 and 7.

The possible combinations are

1*4*3 (with 5) +  1*4*3(with 7) = 24

Total combinations are 5*4*3=60

(24/60)*100 = 40 %

     2. Odd numbers are those which don't divide with 2. So in this case it is 6 and 8.

The possible combinations are

1*4*3 (with 6) +  1*4*3(with 8) = 24

Total combinations are 5*4*3=60

(24/60)*100 = 40 %





3 0
3 years ago
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