It’s 28 divided by 7 x 15 -13
How do I know ? I’m in high school and I just worked it out !!
Answer:
its the first choice, negative 1 plus or minus square root of 21 over 2
Step-by-step explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
Or just subtract
9.884 * 10^6 - 1.009 * 10^7=
− 2.05999999 × 10^5
Rounded up is:
− 2.06× 10^5
(❁´◡`❁)
I think it is just rotations. When I look at is I group the three together and those three are the ones being rotated.
Hope this helps :)))