What is the cost of 400g at £1.50 per 1/2kg

1 answer:

6 0

Well 0.5kg is an awkward number, so let's double £1.50 and 0.5kg to get £3 for 1kg, or 1000g.

So now, we can set up a proportion. (x is the cost)

$\frac{3}{1000} = \frac{x}{400}$ .

Now we multiply 400 on both sides to get 'x' on its own.

$\frac{3}{1000}$ × $400 = 1.2$

So now, we know the cost for 400g = £1.20.

You might be interested in

To get 20%percent what is it divide by

zysi [14]

12 ÷ 60 = 0.20 or 20%

5 0

3 years ago

Read 2 more answers

How to I find this?<br><br> What percent of 60 is 42?

Tpy6a [65]

So let's put it this way-
N% x 60 = 42
You want to isolate the variable
42/60 = N%
42/60 is .7 which is 70%
Hope this helps :)

4 0

2 years ago

Read 2 more answers

A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given th

taurus [48]

Answer:

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 27 - 1 = 26

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.0518