A. How many amoebas are there after 1 hour
Evaluation of the expression using order of operation gives 26/11.
How to evaluate the expression
Given 13 ÷(2.5-1-3).33 = 13 ÷ 33( 2 x 5 - 1 - 3)
To evaluate this expression we need to apply the order of operation rule, BODMAS or PEMDAS.
13 ÷(2.5-1-3).33 = 13 ÷ 33( 2 x 5 - 1 - 3) Evaluate multiplication
= 13 ÷ 33(10 - 1 - 3) Evaluate what is in the bracket
= 13 ÷ 33(6) Evaluate division
= 13/33 x 6
= 78/ 33 = 26/11
Therefore, evaluating the expression gives 26/11.
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Answer:
23 school vans and 19 school buses
Step-by-step explanation:
Let x be the number of school vans and y be the number of school buses needed.
1. There are a total of 42 vehicles, so
2. Students will ride in school vans which carry 8 passengers, so in x vans there will be passengers and on schools buses which carry 40 passengers, so in y buses there will be passengers. There are 944 students going. Therefore,
a. You get the system of two equations:
b. From the first equation:
Substitute it into the second equation:
Divide this equation by 8:
23 school vans and 19 school buses
Volume of a pyramid=area of base×height
∴base area=volume÷height
=300m³÷3m
=100m²