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Serhud [2]
2 years ago
15

Mr. Stanford has a class of 6 girls and 9 boys. If he randomly chooses a student to do an errand what is the probability he choo

ses a boy
Mathematics
1 answer:
lesya692 [45]2 years ago
8 0

Answer:

50%

Step-by-step explanation:

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How much water should be added to 3 gallons of pure acid in order to obtain the 15% acid solution? HELP DUE BY TOMMOROW MORNING
Pani-rosa [81]
3 gallons of acid = 100% concentration acid
? (water+acid) gallons = 15 concentration acid

Note: Every gallon of water added reduces the percentage concentration of acid. Therefore, the relationship is inverse proportionality.

Solution:

Total number of gallons (water+acid) = (3*100)/15 = 20 gallons
Therefore, gallons of water = 20-3 = 17 gallons
5 0
3 years ago
Is 2.55 a irrational, rational, integer, whole number or natural number?
satela [25.4K]

So, the first thing we need to know is what is what.


So,  A natural number is a whole number

A whole number is an integer

and An integer is a rational number.


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4 0
2 years ago
Express cos k as a fraction in simplest terms.
yan [13]

soh cah toa

that is the saying I use

we will use cah

c is cos

a is ajacent

h is hypotinuse

to find cos K we need to do

adjacent / hypotenuse

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6 0
1 year ago
Find each number. round to the nearest tenth if necessary. What percent of 16 is 12?
kvasek [131]
.16x=12 x= 12/.16. x=75
8 0
2 years ago
What is the Range and Mean?
velikii [3]

Answer:

Range:35

Mean:27.6

Step-by-step explanation:

Range is the highest number minus the smallest number 40-5=35

Mean is adding up all the numbers,then divide by how many numbers there are 414 divided by 15

3 0
3 years ago
Read 2 more answers
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