Nadia's father bought a new camera, lens, and case. he rounded the cost of all the items to estimate how much he would need. he rounded the cost of the camera to $800,the cost of the lens to$500 and the cost of the case to $200. the actual cost of all theee items was $1489. what could the actual costs of the items be?

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

What is coefficient of the term of degree of degree 5 in the polynomial below

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%