Travis, jessica ,and robin are collecting donations for the school band. travis wants to collect 20% more than jessica, and robin wants to collect 35% more than travis. if the students meet their goals and travis collects $4,how much money did they collect in all?

They collected $12.73 in all.

Step-by-step explanation:

This problem can be solved by a simple system of equations.

I am going to say that x is the quantity that Travis collects, y the quantity that Jessica collects and z the quantity that Robin collects.

The problems asks how much money did they collect in all?

So

Solution

The problem states that Travis wants to collect 20% more than Jessica, so:

Robin wants to collect 35% more than Travis, so:

Travis collects $4, so . So:

------------

The total is:

They collected $12.73 in all.

this is false ^.^ lol

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;