Please I need help with this): Mary is looking at her bank statement. Date Description Debit ($) Credit ($) Balance ($) Opening Balance 372.73 12 Oct CHQ 7743 Hair 43.75 15 Oct DD Telephone 28.67 23 Oct CHQ 1275 12.49 Closing Balance
Estimate the closing balance of Mary's account: $
(Round each figure to the nearest 10 dollars before estimating)

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?