Answer: A) True because the leading coefficient is negative
Explanation:
The leading term is -x^2 since this term has the largest exponent.
The leading coefficient is -1 as it's the coefficient of the leading term.
It might help to write -x^2 as -1x^2
The negative leading coefficient makes the parabola open downward, so each endpoint goes off to negative infinity. The graph looks like a frowny face. You can think of a negative emotion going with a frowny face, so that negative emotion matches with the negative leading coefficient. There are probably other ways to remember but that's the trick I use.
Answer:
of a meter in scientific notation.
0.000665 meter in standard notation.
Step by step explanation:
We have been given that Dr. Calvin measured the thickness of a piece of metal to be 0.00064 of a meter. Dr. Amos measured another piece to be 
of a meter thick.
We can see that Dr. Amos has given measurements in scientific notation. Let us convert thickness measured by Dr. Amos from scientific notation to standard notation.
Now let us add both measurements to find the thickness of new metal piece.
Now let us convert thickness of new piece of metal in scientific notation.
Therefore, the thickness of new piece of metal will be of a meter or 0.000665 meter.
Gas is $2.53⁹ per gallon today, at that filling station
down the street from my house.
I have $10 in my pocket.
a). How much gas can I put in the car if I go there ?
b). My car gets 25 miles per gallon. How many 'miles' will my $10 buy ?
c). In Calgary (Alberta, Canada) today, gas is selling for
89¢ (Canadian) per liter. What is the percentage more or less,
compared to the price of gas down the street from my house ?
If I posted this problem on Brainly, I'd probably give it
something like 5 points for part-a, another 5 for part-b,
and 10 or 15 for part-c because in addition to math,
that part takes some research.
