solve the following trigo equation for 0°<= x <= 360°. sec x =-2 Question solved general 5 months ago 1776
a bank finds that the balances in its savings accounts are normally distributed with a mean of $500 and a standard deviation off of $40. What is the probability that a randomly selected account has a balance of more than $400? Question solved general 5 months ago 1925
5 people can complete a task in 72 hours. How many people are needed to complete the task in 60 hours. Question solved general 5 months ago 1088
math question a bookstore announces a promotion valid for the same purchase as follows: buy a book and get 10% off the total purchase! buy two books and get 20% off your total purchase! buy three or more books and get 30% off your total purchase! Marcelo wanted to buy three books that cost 20.00 each without discount but he decided to buy two books in one day and another purchase with the third book the next day. If he had bought the three books at once he would have saved the following amount. Question solved general 5 months ago 998
Given that y = ×(2x + 1)*, show that dy = (2x + 1)" (Ax + B) dx where n, A and B are constants to be found. Question solved general 5 months ago 175
Use the elimination to find the solution to each linear system. X+y=43 2x-y=20 Question solved general 5 months ago 2010
Given the Progression 2,8,32,128… calculate the seventh term of the progression Question solved general 5 months ago 485
It has been determined that in Costa Rica 20% of families are lower class; Meanwhile, the percentage of middle and upper class families must be determined. Of upper class families, 90% usually leave the country by the end of the year, 30% of middle class families and 5% of lower class families do the same. The probability that a randomly chosen middle-class family who happened to leave the country at the end of last year was 0.4. Determine the percentage of upper class families in Costa Rica Question solved general 5 months ago 2423
The normal distribution graph does not behave symmetrically when I analyze it using a vertical axis and have the mean a as a relationship. False b. TRUE Question solved general 5 months ago 840
Average Weekly Earnings The average weekly earnings in dollars for various industries are listed below. Find the percentile rank of each value. Round to the nearest whole percentile. 459, 451, 490, 580, 453, 841, 687, 514 the percentile rank of the value 490 is Question solved general 5 months ago 888
The density of potassium (K), is 8.56 × 102 kg/m3. Convert the density to g/cm3. Question solved general 5 months ago 660
it is given the family of quadratic funcion f(x)=2x2+(m+6)x+8. For which m-s will the graph will lie above the alphabetical axis Question solved general 5 months ago 1877
What value of x makes the equation 5e3x=36 true? Round your answer to the nearest tenth. Question solved general 5 months ago 542
Determine an equation of a plane parallel to a coordinate plane that contains the points (3, 4, −5) and (−2, 8, −5). Question solved general 5 months ago 1090