A carbon atom can form four covalent bonds. How many valence electrons does a carbon atom have?

Harold collected 360 stamps to his trip to Europe. he collected 35% of his stamps in Scotland, 15% of his stamps in Ireland, 25% of his stamps in Italy, and the rest in Greece. How many more stamps does he have from Scotland than from Greece

Two students recently took algebra class tests. the students are at different schools but wanted to compare their performance. the first student scored 80 on the test. her class average was 90 with a standard deviation of 10.

Use all 2,4,6,8 Once and any operation and brackets to find two equations that equal 24

The width of a rectangle is 4 more than half the length. If the perimeter of the rectangle is 74, what is the width? Perimeter of rectangle: P = 2l + 2w width = length =

35 scuba divers succeeded in their lobster quest. If there were 175 divers, what percent succeeded in their lobster quest?

Why 6:4 and 18:8 are not equivalent ratios

A roofing contractor give us an estimate for shingling a 20' x 10' section of a roof the contractor estimates $27.

I ran 800m, 5km, 1,000cm. How many meters did I run all together

4.9 divided by 160.72

What is |3+10|=|3|+|10|