Magnesium has a density of 1.071 g/cm3

. Aluminium has a density of 2.700

g/cm3

. An unknown metal has a mass of 15 g and a volume of 14 cm3

. Is the

unknown metal magnesium or aluminium? Show your work for complete marks.

Simplify 17 square root 17 - 9 square root 17

Nao and Arban drive to work. Nao drives 95 miles in 2.5 hours. Arban drives 128 km in 1 hour 15 min. Work out the difference between their average speeds in km/h. 1 mile = 1.6 km

During batting practice, two pop flies are hit from the same location, 2 s apart. The paths are modeled by the equations h = - 16t^2 + 56t and h = - 16t^2 + 156t - 248, where t is the time that has passed since the first ball was hit.

John's dog slept for 3 hours. If the dog slept 1/3 of every hour, how many times did he snore?

If PX = 56, Find (x - 2) !

Maria's phone bills were 95 67 43 and 115 what is the mean or average of her phone bill

Divide the following polynomials and then complete the quotient. Write your answer in order of decreasing powers of x. (32x^8 - 8x^6 + 28x^4) / 4x^4

Cindy has 34 meters of fencing. She plans to fence in a rectangular dog run that is 4 meters wide. [Remember, the formula for the perimeter of a rectangle (the distance around) is p = 2L + 2w, where L= length and w = width.]

How many minutes is 4:15 pm to 5:00 pm?

You increase the amounts of ingredients in a recipe to make a proportional recipe. the original recipe uses two avocados and 0.25 cup of minced onions. the new recipe has 1.5 cups of minced onions.