What is the product for this

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?