Amir is operating a machine that adds sand to a concrete mixture. the machine adds 1/10 ton of sand to the mixture in 4/5 minute. enter a number in each box to complete the statements. write the ratio that compares 1/10 ton of sand to 4/5 minute. the ratio in ton(s) per minute(s) is $$ . simplify the ratio to find the amount of sand added in one minute. ton(s) per minute

for the above question, we can first convert the fractions to decimals to make it easier to work with

1/10 of sand - 0.1 ton 

4/5 minute - 0.8 minute

Q1 - 

ratio 

0.1:0.8

since the ratio is in decimals we can convert it to whole numbers by multiplying by 10

1:8

Q2. amount of sand added in 0.8 minutes - 0.1 ton

       amount of sand added in 1 minute - 0.1/0.8 = 0.125 tons

where is the image?

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;