Solve the problem.A person puts $30 into a bank account on January 1, $40 on February 1, $50 on March 1, and so forth. How much has the person put into the bank account by December 30?
A. $840
B. $1080
C. $2040
D. $1020
Answer: D
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Solve.A brick wall 16 m by 34 m is 0.52 m thick. Under particular temperature conditions, the rate of heat flow through the wall, in calories per second is given by the expression 
. Calculate the value of this quantity to the nearest tenth.
A. 16.2 calories per second B. 6.8 calories per second C. 4.8 calories per second D. 17.8 calories per second
The bar graph shows the percent of income spent on leisure activities in various countries of the world. Use the graph to answer the question.
List all countries in the graph in which less than 12% of household income is spent, on average, for leisure activities.
A. China, Australia, France B. Germany, Britain, Japan, USA C. China, Australia, France, Germany D. China, Australia
Write in scientific notation.0.000000093006
A. 9.3006 × 10-9 B. 9.3006 × 10-8 C. 9.3006 × 108 D. 9.3006 × 10-7
Determine which functions are one-to-one.
 figure 1.png)
(a) I only
(b) I, II
(c) I, II, III
(d) II only
(e) III only