Can someone please help me with these math problems

1a.) $21

1b.) $30.21

2a.) 4 inches squared

2b) 35 inches squared

Step-by-step explanation:

1a.) 15 × .40 = 6. Six is how much the mark up is. So you have to add it to the original cost which is 15. So, 15 + 6 = 21.

1b.) Do the times, minus, times, plus method if you have tax and discount all in one problem. So 38 × .25 = 9.50. This is how much you are saving, so you will subtract it from the original price, 38 - 9.50 = 28.50. Now you need to include the tax. So 28.50 × .06 = 1.71. This is how much tax you have to pay so add it to the current total of 28.50. So now, 28.50 + 1.71 = 30.21. Always apply the discount before the tax.

2a.) The height of the triangle is 4 and the width of the base of the triangle is 2. So you have to do 4 × 2 = 8. Then all triangles have to be divided by two since they are half of a square or rectangle. 8 ÷ 2 = 4.

2b.) The area of the non shaded regions: You have the top right square that is 2 × 2 = 4.

The small rectangle that is 3 inches wide is 1 inch tall. I got 1 inch because I subtracted the 5 inches vertical height from the 4 inch vertical height to get 1 inch. So that rectangle is 3 × 1 = 3. Then the large rectangle is 6 × 4 = 24. And the white triangle is 2 × 4 = 8, then divided by 2 which equals 4. So add 4, 3, 24, and 4 to get 35 inches squared.

50x5=$250

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)