Thomas R.

What is the probability if i roll a die and its odd or less than 5

An electric company found the relationship between house size (x, in square feet) and monthly electric bill (y, in dollars) is given by yˆy^ = 0.03x + 18.50. Use this least squares line to predict... more

If the weight of female high school students closely follows the normal distribution with a mean of 125 pounds and a standard deviation of 5 pounds, what range of weights includes the middle 80% of... more

I used substitution method and got one answer then used matrix method and got a completely different answer

A local board of education conducted a survey of residents in the community concerning a property tax levy on the coming local ballot. They randomly selected 850 residents in the community and... more

I have no idea how to help my daughter. Please help. Explain how to do this for me

Ursula and her friends are playing hoop rolling. Ursula rolls a large hoop on the ground. The hoop rotates through an angle of 3/2π radians in 1 second.

the dealer purchased an item, marked it up (increased its price) and sold it to a customer for $560. If the markup was 40% of the dealer's purchase price, what did the dealer pay for the item?  

An endangered species of fish has a population that is decreasing exponentially. The population 8 years ago was 3700. Today, only 1700 of the fish are alive. Once the population drops below 75, the... more

  I NEED HELP WITH CONVERTING!

This is the problem: ½ log a (x+2) + ½ log a (x-2) = 2/3 log a 27 And, this is what the teacher gave as notes to solve the problem: Log a √x+2 + log a √x-2 = log a 27^2/3                          ... more

A. 0°,30° B. 30° C. 30°,  90° D. 0°, 60°

What happened??