Why studying economics is very hard

Step-by-step explanation:

Economics is a branch of social science and it deals with more of observations, theories, laws, deductions and construction of abstracts model.

So, to do all of these, economists need to be good at mathematics to approach some of these abstracts model.

Like all other scientist, economists also do hypothesis to allow them study the economy growth and help them construct a model that solve this goals these requires a lot of mathematical models and abstract reasoning. They usually employ mathematical and graphical models and analysis to solve the economic issue e.g. demand and supply curves analysis

Economic models usually employ graphical and mathematical analysis to help explain and illustrate such economic processes.

All of these makes economic very hard to study. So to study economics, you need to be good at mathematics

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94