Answer:
C. 4i
Step-by-step explanation:
√-1 is imaginary number i
Step 1: Write expression
√-16
Step 2: Factor
√-1 · √16
Step 3: Simplify
i · 4
4i
Using proportions, it is found that it will take you 392 seconds = 6 minutes and 32 seconds to complete 4 laps.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
In this problem, considering the given rates, the time that is takes to complete one lap of 400 m is given by:
t = 2 x 12(sprint) + 24(half as fast as the sprint, 24 seconds per 100 meters) + 50 = 98 seconds.
Hence for 4 laps, the time is given by:
t = 4 x 98 seconds = 392 seconds = 6 minutes and 32 seconds to complete 4 laps.
More can be learned about proportions at brainly.com/question/24372153
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Answer:
The area of triangle AED is 12 square centimeters
Step-by-step explanation:
<u><em>The question in English is</em></u>
The isosceles trapezoid ABCD, whose area is equal to 72 cm2, is divided into an AED triangle and a EBCD trapezoid. The AE segment is 4 cm long and the CD segment is 2 times longer. Calculate the area of the AED triangle. Save the calculations.
The picture of the question in the attached figure
step 1
<u>Find the length side DE</u>
we know that
The area of the trapezoid ABCD is given by the formula
so
we have
substitute
solve for DE
step 2
Find the area of triangle AED
The area of triangle AED is given by the formula
substitute the given values
Answer:
A, C, and D
Explanation:
32 rows
15 seats per 1 row
So,
32 × 15 = k
You can try arranging to get more choices.
32 × 15 = k
32 = k ÷ 15
and
32 × 15 = k
15 × 32 = k
15 = k ÷ 32
