Find the smallest number which on adding 19 to it is exactly divisible by 28, 36 and
45.

What is the circumference of a circle with an area of 50.24 cm²?

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?

Will positive numbers always have a higher absolute value than negative numbers?