(9x+10)² or (9x+10)(9x+10)
Place value is the value each digit has in its position: in order from higher to lower value, there is thousands, hundreds, tens, and ones.
When you divide by 10, you are moving (only once) every digit from its present place value to the right.
For example 6430 : 10= 643, you have moved every digit to the right, making the zero disappear (or better yet, separated by a hidden and in this case useless comma).
Answer:97 rods
Step-by-step explanation:
The number of steel rods for 95% confidence level


E=3

Substituting values


Thus 97 rods is tested
Answer:
B)68 by 40
Step-by-step explanation:
First we multiply this ratio by any whole number 16 : 9 . At least to get close to the option.
So I multiplied by 4
Giving me 64:36
So we remember that there is a padding of on both sides of the length and width.
This padding is 2 inch each
It's going to be
= 64+(2+2):36+(2+2)
= 68:40