Layla is using the model to solve a division problem. An area model has 4 shaded parts and 2 unshaded parts. The shaded part is labeled two-thirds. Which question would the model be most helpful in solving? How many One-sixths are in 4? How many One-sixths are in Two-thirds? How many Two-thirdss are in 4? How many Two-thirdss are in One-sixth?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

Leila is buying a dinosaur model. the price of the model is xxx dollars, and she also has to pay a 7\%7%7, percent tax.