Will give ! what is the y-intercept of f(x)=(1/2)^x

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal