Which of these procedures is the same as multiplying a whole number by 1,000?

a). add 1000 to the whole number, 3 times
b). multiply the whole number by 3, ten times
c). move the decimal point there places to the left and fill in the blank places with zeros
d). move each digit of the whole number three places to the left and fill in the blank with places with zeros

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle