The mass of 4m³ of silver is 41960kg. The density of gold is 19300kg/m³.
Calculate the difference in mass between 5m³ of silver and 5m³ of gold.

Material A has a density of 4.5g/cm³.
Material B has a density of 14g/cm³.
5kg of Material A and 200g of Material B form Material C.
Work out the density of Material C.

A solid sphere has a diameter of 12cm.
The sphere is made from glass.
The density of the glass is 3.02g/cm
Find the mass of the glass sphere.

is there any photos or whatever?

0.038

step-by-step explanation:

the opening of this porabola is facing up

step-by-step explanation:

the answer is $4.45. i started by figuring out the cost of the plates and napkins. the easiest way to figure this cost out is through the tax. we know the way they found the tax is by multiplying the cost of non-food items by the tax rate (5% or 0.5). so, all we have to do to find the cost before tax is set up an equation and work this formula backwards. the equation is 0.19=0.05x where x is the cost of the plates and napkins. now all you do is divide both sides by 0.05 to come up with 3.8=x. now that we know the cost of the plates and napkins is $3.80, all we have to do is subtract this cost from the total cost of $8.25 giving us the cost of the watermelon which is $4.45.