Express 2,830,000 in scientific notation

Suppose x varies directly with y and inversely with z. If x=14 when y=49 and z=7, then what is x when y=18 and z=6?

4070 divided by 6 in long division messed up somewhere

Is 100 in greater least or equal to 3 yd 1 ft

Identify the function in which y varies directly with x. y = 0.5x y = 0x y = 4x + 1 y = 2x - 7 confused on if its A or B

If it snows tomorrow, the probability is 0.9 that John will practice his trombone. If it does not snow tomorrow, there is on a 0.5 chance that John will practice. Suppose the chance of snow tomorrow is 50%.

What's the parabola in vertex for for (-5,0) and has a vertex (-2,1)

He length of a rectangle is 7 in greater than the width. the area is 30 in squared2. find the length and the width

The second side of the triangle deck is 4 feet longer than the shortest side. The third side of the deck is 4 feet shorter than twice the length of the shortest side. If the perimeter of the deck is 76 feet, what are the lengths of the three sides?

The sum of the first 100 positive numbers?

A buck sold 32,300 copies in its first month of release. Suppose this represents 8.8% of the number of copies sold today. How many copies have been sold to date?