Answer:
95
Step-by-step explanation:
let x be his mark in the fourth test, then
mean =
= 83 ( multiply both sides by 4 )
83 + 81 + 73 + x = 332
237 + x = 332 ( subtract 237 from both sides )
x = 95
Answer:
about 10
Step-by-step explanation:
62.8 = 2 pi r/2
62.8/2 = pi r
31.4/pi = pi r/pi
about 10 = r
48. B and 47 is out of c and b
Answer:
5
Step-by-step explanation:
A device extracts 37 liters of water per day
Therefore the number of days it will take to extract 185 liters can be calculated as follows
= 185/37
= 5
Hence it would take 5 days
Irrational numbers can be written as decimals but not as fractions.
0.144 is a decimal, but it can also be written as 18/125. So this is a rational number.
√0.144 is equal to 0.3794733192. It cannot be expressed into a fraction. So, this is an irrational number.
√0.0144 is equal to 3/25. So, this is a rational number.
I hope I was able to help you. Have a good day.