ABC is a triangle. AC=19cm, BC=17cm and angle BAC=60

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

How many zeros does the function f(x)=4x3-x2+1 have

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds