Gena wants to estimate the quotient of –21.87 divided by 4.79. Which expression shows the estimate using front-end estimation? Negative 21 divided by 4
Negative 21 divided by 5
Negative 20 divided by 4
Negative 20 divided by 5

Hi my sisters and brothers can tell me the answer because i don’t understand the question

The amount cami raised during last year’s charity walk, $45.50, is 7/10 of the amount she raised this year. which equation represents n, the number of dollars she raised this year?

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x, y,z) = (1,-x, z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)