Solve the problem.A rumor is spread at an elementary school with 1200 students according to the model 
where N is the number of students who have heard the rumor and d is the number of days that have elapsed since the rumor began. How many days must elapse for 500 to have heard the rumor?
Fill in the blank(s) with the appropriate word(s).
about 3.4 days
Mathematics
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Determine if each statement is true if
(i) PQRS is a rectangle
(ii) PQRS is a square
In each case, if true, explain why.
(a) PR ? SQ
(b) ?STP ? ?QTR
(c) ?STP ? 90°
(d) ?QPT ? ?SRT
Mathematics
Solve the problem.Janet is planning to take karate lessons. The lessons cost $34 per month. In addition, there's an initiation fee of $10 and the uniform costs $22. What are Janet's total costs for the first year?
A. $440 B. $430 C. $792 D. $418
Mathematics
Estimate. Choose a rounding digit that gives one or two nonzero digits.22 × 61
A. 1,200 B. 12 C. 2,400 D. 120
Mathematics
Solve the equation.
- 
= 1
A. {-3, -1} B. {3} C. {-1, 3} D. ?
Mathematics