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MEDICAL RESEARCH Based on data obtained from the National Institute of Dental Research, it has been determined that 42% of 12-yr-olds have never had a cavity, 34% of 13-yr-olds have never had a cavity, and 28% of 14-yrolds have never had a cavity. Suppose a child is selected at random from a group of 24 junior high school students that includes six 12-yr-olds, eight 13-yr-olds, and ten 14-yrolds. If this child does not have a cavity, what is the probability that this child is 14 yrs old?
The mean weight of loads of rock is 43.0 tons with a standard deviation of 12.0 tons. If 9 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 38.60 tons. Assume that the variable is ..
What is the definition of multiple in the following context: multiples of 30 are 30, 60, 90, 120,150,180,210, and etc? Another example is: multiple of 75 are 75,150,225,300,375,450, and etc. Please provide a concise definition for multiple.
The frequency table shows data collected by the police in a automobile speed check. Which interval contains the median speed.
block of metal has a width of 3.2 rm cm, a length of 17.1 rm cm, and height of 4.9 cm. Its mass is 1.5 kg. Calculate the density of the metal.
Sketch and shade in this region. Set up the integral(s) needed to find the area if we use the Slices that are perpendicular to the x-axis.
What's the best way to solve for a derivative? And the second derivative
Find the points on the curve where the tangent is horizontal or vertical. Find the equation of the tangents to the curve x = 3t2 + 1, y = 2t3 + 1
In a second grade class containing 15 girls and 7 boys, 2 students are selected at random to give out the math papers. What is the probability that the second student chosen is a boy, given that the first one was a girl? Whic would be the correct ..
Maria and Thomas are part of a group of 8 women and 8 men who will participate in a chess tournament. The 16 players will be randomly paired up into groups of two.
Two tracking stations are on the equator 134 miles apart. A weather balloon is located on a bearing of N 38°E from the western station and on a bearing of N 19°E from the eastern station. How far is the balloon from the western station? Round to t..
Explain why AB is also orthogonally diagonalizable.
353 people attend a play at a private club. Members get tickets at $2.75, while non-members have to pay $6.50. If the total gate for the playcame to $1762, how many members and non-members came to the play?
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