Solve the problem.On the June 10 billing date, Yuri had a balance due of $441.53 on his credit card. The transactions during the following month were: The interest rate on the card is 1.8% per month. Using the previous balance method, find the new balance on July 10.

A. $1937.29
B. $1901.13
C. $1875.46
D. $387.65


Answer: C

Mathematics

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Find the value of the expression.-  - 

A. 23 B. -19 C. 19 D. -23

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Provide an appropriate response.If  of all plumbers in the city belong to the plumber's union, what percent belong to the union?

A. 60% B. 40% C. 80% D. 20%

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Decide whether the statement is true or false.The y-intercepts of the ellipse with equation  +  = 1 are  and 

A. True B. False

Mathematics

Figure (a) shows a vacant lot with a 80-ft frontage in a development. To estimate its area, we introduce a coordinate system so that the x-axis coincides with the edge of the straight road forming the lower boundary of the property, as shown in Figure (b). Then, thinking of the upper boundary of the property as the graph of a continuous function f over the interval [0, 80], we see that the problem is mathematically equivalent to that of finding the area under the graph of f on [0, 80]. To estimate the area of the lot using a Riemann sum, we divide the interval [0, 80] into four equal subintervals of length 20 ft. Then, using surveyor's equipment, we measure the distance from the midpoint of each of these subintervals to the upper boundary of the property. These measurements give the

values of f(x) at x = 10, 30, 50, and 70. What is the approximate area of the lot?
?

?

?
__________ square feet

Fill in the blank(s) with the appropriate word(s).

Mathematics