a. The graph is concave up in the interval 0 ≤ x ≤ +∞
b. The graph is concave down in the interval -∞ ≤ x ≤ 0
To answer the question, we need to know what intervals are
<h3>What are intervals?</h3>
Intervals are range of values in which a function is valid. It can either be the range of values of input or output of the function.
<h3>a. Interval where the graph is concave up</h3>
From the graph, we see that the function is concave up in the interval 0 ≤ x ≤ +∞
So, the graph is concave up in the interval 0 ≤ x ≤ +∞
<h3>b. Interval where the graph is concave down</h3>
From the graph, we see that the function is concave down in the interval -∞ ≤ x ≤ 0
So, the graph is concave down in the interval -∞ ≤ x ≤ 0
Learn more about intervals here:
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Step-by-step explanation:
-3(2x-3)=6x+9
-6x+9=6x+9
-6x-6x=9-9
-12x=0
x=0
Answer: A) 112cm^3
Use the pyramid formula: v= length × width × height / 3
Plug in the equation to formula
V= 8 × 7 × 6 / 3
Multiply and divide and you get 112 cm^3
the right answers is B have a great day