Answer:
19
Step-by-step explanation:
because it is looking for the total of stuff
Answer:
A
Step-by-step explanation:
After 500 trials, she should expect 0.16 * 500, or 80 red marbles. 0.16 is the frequency of red (8/50). If you extend this expected frequency to 500 trials, it will be 80.
Hello,
let's assume a=the length and b the width.
![\left\{\begin{array}{ccc}a&=&2*b\\2(a+b)&=&60\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}a&=&2*b\\a+b&=&30\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}a&=&2*b\\3b&=&30\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}b&=&10\\a&=&20\\\end{array}\right.\\\\\\Area=10*20=200\ (ft^2)\\](https://tex.z-dn.net/?f=%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bccc%7Da%26%3D%262%2Ab%5C%5C2%28a%2Bb%29%26%3D%2660%5C%5C%5Cend%7Barray%7D%5Cright.%5C%5C%5C%5C%5C%5C%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bccc%7Da%26%3D%262%2Ab%5C%5Ca%2Bb%26%3D%2630%5C%5C%5Cend%7Barray%7D%5Cright.%5C%5C%5C%5C%5C%5C%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bccc%7Da%26%3D%262%2Ab%5C%5C3b%26%3D%2630%5C%5C%5Cend%7Barray%7D%5Cright.%5C%5C%5C%5C%5C%5C%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bccc%7Db%26%3D%2610%5C%5Ca%26%3D%2620%5C%5C%5Cend%7Barray%7D%5Cright.%5C%5C%5C%5C%5C%5CArea%3D10%2A20%3D200%5C%20%28ft%5E2%29%5C%5C)