200 students, which was 40% of the 7th graders said that the dress code was an important issue at school. How many students are in the 7th grade?

9/18 : 3/6 = Worth 94pts

If a sprinkler waters 1 over 12 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn?

The value 2,000 is decreased to 100. What is the percent?

The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting less than 250 days. A) 0.0066. B) 0.0606. C) 0.1151. D) 0.1591.

Diana invested some money in a bank at a fixed rate of interest compounded annually. The equation below shows the value of her investment after x years: f (x) = 400 (1.

A card is drawn from a standard deck of 52 playing cards. Find the probability if the card is ... A) an ace or heart B) an even number or a spade C) a red queen or black face card D) a face card or a heart

A random sample of museum visitors were asked whether they will purchase tickets to an upcoming exhibit. The resulting confidence interval for the proportion of visitors who will purchase tickets is (0.1,0.2). What is the margin of error?

Write the quadratic equation whose roots are - 4 and 1, and whose leading coefficient is 4

Millie went shopping and took £60 to spend. she spent 1/2 of her money on a pair of shoes, she then spent 2/3 of what she had left on a pair of jeans. how much money did she have left at the end of her shopping trip?

Circle two addends to add first. write the sum 7,3,3