Here is a plan of Martin's driveway. 11m by 4 m

Martin is going to cover his driveway with gravel.
The gravel will be 6 cm deep.
Gravel is sold in bags.
There are 0.4 m3 of gravel in each bag.
Each bag of gravel costs £38
Martin gets a discount of 30% off the cost of the gravel.
Work out the total amount of money Martin pays for the gravel.

Which expression is equivalent to −16y+13 ? −16(−y+13) 16(−y+2) −16(y+2) 16(−y+13)

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6