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Ready4	If money is invested at $r$ percent interest, compounded annually, the amount of the investment will double in approximately $\frac{72}{r}$ years. If $6,000 is invested in an account that pays 9 percent interest, compounded annually, approximately how many years will it take for the value of the investment to be 4 times its initial value?
Ready4	If money is invested at $r$ percent interest, compounded annually, the amount of the investment will double in approximately $\frac{70}{r}$ years. If $7,500 is invested in an account that pays 5 percent interest, compounded annually, how many years will it take for the value of the investment to be 4 times its initial value?
Ready4	If money is invested at $r$ percent interest, compounded annually, the amount of the investment will double in approximately $\frac{72}{r}$ years. If Deepee invested $4,000 in an account that pays 8 percent interest, compounded annually, approximately how many years will it take for the total value of the investment to double?
Ready4	If $n=p^2$ , where $p$ is a prime number greater than $2$ , how many different positive odd divisors does $n$ have, including $n$ ?
Ready4	If $k=5p$ , where $p$ is a prime number greater than $2$ , how many different positive even divisors does $k$ have, including $k$ ?
Ready4	In the figure above, line segment $\overline{UT}$ has length $16$ , and rectangle $PQRU$ is a square. If the area of rectangular region $PQST$ is $225$ , what is the area of rectangular region $URST$ ?
Ready4	In the figure above, line segment $\overline{DE}$ has length $15$ , and rectangle $CDGH$ is a square. If the area of rectangular region $CEFH$ is $324$ , what is the area of rectangular region $DEFG$ ?
Ready4	In the figure above, line segment $FL$ has length 10, and rectangle $HJKL$ is a square. If the area of rectangular region $FGJK$ is 144, what is the area of rectangular region $FGHL$ ?
Ready4	If a two-digit positive integer has its digits reversed, the sum of the resulting integer and the original integer is $110$ . What is the sum of the digits in the original number?
Ready4	In the figure shown, the triangle is inscribed in the semicircle. If the length of line segment AB is 8 and the length of line segment BC is 6, what is the length of arc ABC?
Ready4	If non-negative integers $s$ and $t$ are not both even, which of the following must be even?
Ready4	If non-negative integers $n$ and $p$ are not both odd, which of the following must be odd?
Ready4	If positive integers $x$ and $y$ are not both even, which of the following must be odd?
Ready4	If $H$ and $K$ are sets of integers, $H \Delta K$ denotes the set of integers that belong to set $H$ or to set $K$ , but not to both. If $H$ consists of 20 integers, $K$ consists of 16 integers, and 14 integers are in both $H$ and $K$ , then $H \Delta K$ consists of how many integers?
Ready4	If $R$ and $S$ are sets of integers, then $R \Delta S$ denotes the set of integers that belong to set $R$ or to set $S$ , but not to both. If $R$ consists of $13$ integers, $S$ consists of $17$ integers, and $9$ integers are in both $R$ and $S$ , then $R \Delta S$ consists of how many integers?
Ready4	If $P$ and $Q$ are sets of integers, $P \Delta Q$ denotes the set of integers that belong to set $P$ or set $Q$ , but not both. If $P$ consists of 15 integers, $Q$ consists of 8 integers, and 4 integers are in both $P$ and $Q$ , then $P \Delta Q$ consists of how many integers?
Ready4	What is the value of $3x^2-1.3x-0.9$ when $x=0.2$ ?
Ready4	What is the value of $2x^2-0.25x+1.2$ when $x=0.8$ ?
Ready4	What is the value of $3x^2+1.5x-2.2$ when $x=0.4$ ?
Ready4	In the figure above, $O$ is the center of the circle and the measure of $\angle XOY$ is $72\degree$ . If the circumference of the circle is $16$ millimeters, what is the length, in millimeters, of arc $XY$ ?