Sophie is making 400 scones. She uses butter, sugar and flour in the ratio 2:1:9

Here are the costs of those ingredients.

The total mass of the butter, sugar and flour in each scone is 30g

Work out the total cost of these ingredients for the 400 scones.

Butter £2.20 per 500g
sugar £1.60 per kilogram
Flour 60p per 1.5kg

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Given the following linear function sketch the graph of the function and find the domain and range. ƒ(x) = -5x + 4

Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.