A recent survey has shown that 68% of professional photos are of humans, 39% are of pets, and 17% are of both humans and pets. Suppose a professional photo is selected at random and it is of a human. What is the probability that the photo also has a pet? A) 0.17
B) 0.25
C) 0.39
D) 0.44

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¯¯¯¯¯¯¯¯)?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

For the inequality |c| < |d| to be true, which of the following must be true?