You are charged $9.33 total for a meal, assume the 7% sales tax, how much was the menu price of this item

Can someone answer these problems for me

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

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?