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What is 21.7 × 9.4? A 287.68 E 412.96 B 532.42 C 117.24 D 203.98

You can use estimation to work out the answer to this question. 21.7 × 9.4 is approximately 22 × 10 = 220. The answer will be the option that is closest to 220, which is option D.
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Answered by Akash K. • Maths tutor
3817 Views

Solve the equation 3x^(2)-7x+3 giving your answer to three significant figures.

Since there is no further factorisation possible we use the quadratic formula x=[-b±√(b 2 -4ac)]/2a. From the equation in question we have a=3, b=-7, c=3. Substituting into the quadratic formula x=[7±√((-7) ...
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Answered by Benjamin H. • Maths tutor
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Discuss the disadvantages of using a census to gather population data

Many countries all over the world use censuses to gather information about their population. Questions asked in a census include age, gender, nationality, employment and living situation. A census is usually...
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Answered by Aaron M. • Geography tutor
20844 Views

Explain the formation of a corrie

Corries are geological features that are formed through glaciation. The glacier sticks to the sides of the valley and, as it moves, pulls away large chunks of rock in a process known as plucking. During the ...
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Answered by Aaron M. • Geography tutor
39588 Views

Use the substitution u=4x-1 to find the exact value of 1/4<int<1/2 ((5-2x)(4x-1)^1/3)dx

We are required to solve this integral using integration by substitution, in which we assign a variable to equal a certain region of the integrated function in this case, 4x-1. The purpose of this is to remo...
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Answered by Taylor R. • Maths tutor
6863 Views