math with calculators

Calculate, with the help of the distributive property, the total number of items in the given figure. => 63 or 56 or 52 or 49..

Calculate. 55 ÷ 5 => 10 or 11 or 5 or 4..

To calculate the confidence interval for variance or standard deviation, a statistical distribution called ______ is needed. => chi-square distribution or binomial distribution or poisson distribution or multinomial distribution..

The scores of 10 students in mathematics and statistics examination are shown in the table. Calculate the coefficient of correlation between these two subjects and describe the relationship. Student A B C D E F G H I J Scores in Mathematics 86 96 72 99 90 88 93 78 82 8..

Chris drops a ball from a height of 100 feet above the ground. Calculate the time taken by the ball to hit the ground, if its height is given by the equation h = -16 t 2 + 100, where t is the time in seconds. => 3 or 2.25 or 2.5 or 2.75..

Which of the following represents the graph of f ( x ) = 3 x 3 -11 x + 5 and its non integral real zeros to the nearest tenth? [Use a graphing calculator.] => Figure 2; real zeros of f ( x ) are - 1.6, - 0.5 and 2.1 or Figure 1; real zeros of f ( x ) are - 2.1, 0.5 and 1.6..

Calculate the trapezoidal approximation T n to the integral ∫ 0 π/3 tan x dx . Use n = 5 subintervals and round the answer to two decimal places. => 0.37 or 0.47 or 0.67 or 0.27..

Calculate the trapezoidal approximation T n to the integral ∫ 1 5 1 x d x . Use n = 8 subintervals and round the answer to two decimal places. => 1.60 or 1.93 or 1.63 or 1.87..

Calculate the trapezoidal approximation T n to the integral ∫ 4 5 x 2 dx . Use n = 5 subintervals and round the answer to two decimal places. => 24.62 or 18.5 or 20.34 or 17.85..

The number of diagonals (D) in a polygon can be modeled as a function of number of sides ( n ) by the equation D = n ( n - 3 ) 2 , n > 3. Identify the domain of the function and calculate the number of diagonals of a polygon of 8 sides. => Domain: n = 40 or Domain: n > 3 ; 20 or Dom..