Round off 863 to one significant figure

Solve the following equations for all solutions of x 2sin^2x+3cos-3=0

What does travel 250 miles in 5 hours is

In a class, the teacher asks each person wearing red to name his or her favorite color. Is this sample representative of the entire class? Explain math grade: 7

The mass of a an atom of helium is 6.65 x 10^-24. Use scientific notation to express the mass of 250 helium atoms. A) 1.6625 x 10-21 B) 1.6625 x 10-22 C) 1.6625 x 10-24 D) 1.6625 x 10-26

Factor the expression m^2-3mn-28n^2

Ava's car needs unexpected repairs. She needs money quickly, so she gets an easy-access loan. What is an advantage of using the easy-access loan? A. Ava will get the money she needs quickly. B. Ava will not owe money after the purchase. C.

A diver is - 50.25 meters below the surface of the water. He dives another - 10.5 meters below the surface of the water. What is the total meters the diver is below the surface of the water?

A bag contains purple marbles and yellow marbles, 86 in total. The number of purple marbles is 2 more than 5 times the number of yellow marbles. How many purple marbles are there?

What is the probability of drawing a face card that is a club on the first draw, replacing it and drawing a diamond card on the second draw? This question is based on a 52 card deck without jokers.

If a statement is true, then it's converse must be true as well. True or false