Calculate the rate per litre at which a car uses petrol, if it uses 20l of petrol to travel 180 km​

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer