9-3÷ 1/3 + 1= plz answer correctly because i can get grounded and I will give brainliest and give 20 points

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

Multiply and simplify. 2x2y3z2 · 4xy4x2 how to do?

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams