Math
A sample of 40 fourth-grade students was selected at random from a certain school. The 40 students completed a survey about the morning announcements, and 32 thought the announcements were helpful. Which of the following is the largest population to which the results of the survey can be applied?
a. The 40 students who were surveyed
b. All fourth-grade students at the school
c. All students at the school
d. All fourth-grade students in the county in which the school is located
What is letter B.
When a given industry—water and electricity are two well-known examples—carries high infrastructural start-up costs and other barriers that discourage competition, ______blank of just one or two suppliers per municipality. Such industries are known as natural monopolies.
Which choice completes the text so that it conforms to the conventions of Standard English?
a. these often consist
b. they often consist
c. it often consists
d. this often consists
Letter C: it often consists
A sample of oak has a density of 807 kilograms per cubic meter. The sample is in the shape of a cube, where each edge has a length of meters. To the nearest whole number, what is the mass, in kilograms, of this sample?
a. 588
b. 726
c. 897
d. 1,107
What is letter A.
Jamaican British artist Willard Wigan is known for his remarkable ______blank so small that they are best viewed through a microscope, Wigan’s sculptures are made from tiny natural materials, such as spiderweb strands.
Which choice completes the text so that it conforms to the conventions of Standard English?
a. microsculptures creations
b. microsculptures, creations
c. microsculptures. Creations
d. microsculptures and creations
Letter C: microsculptures. Creations
To determine the mean number of children per household in a community, Tabitha surveyed 20 families at a playground. For the 20 families surveyed, the mean number of children per household was 2.4. Which of the following statements must be true?
a. The mean number of children per household in the community is 2.4
b. A determination about the mean number of children per household in the community should not be made because the sample size is too small.
c. The sampling method is flawed and may produce a biased estimate of the mean number of children per household in the community.
d. The sampling method is not flawed and is likely to produce an unbiased estimate of the mean number of children per household in the community.
What is letter C
The artisans of the Igun Eronmwon guild in Benin City, Nigeria, typically ______blank the bronze- and brass-casting techniques that have been passed down through their families since the thirteenth century, but they don’t strictly observe every tradition; for example, guild members now use air-conditioning motors instead of handheld bellows to help heat their forges.
Which choice completes the text with the most logical and precise word or phrase?
a. experiment with
b. adhere to
c. improve on
d. grapple with
Letter B:adhere to
For an electric field passing through a flat surface perpendicular to it, the electric flux of the electric field through the surface is the product of the electric field’s strength and the area of the surface. A certain flat surface consists of two adjacent squares, where the side length, in meters, of the larger square is 3 times the side length, in meters, of the smaller square. An electric field with strength 29.00 volts per meter passes uniformly through this surface, which is perpendicular to the electric field. If the total electric flux of the electric field through this surface is 4,640 volts-meters, what is the electric flux, in volts-meters, of the electric field through the larger square?
What is 4176
The results of randomized clinical trials testing the efficacy of common medical interventions sometimes fail to ______blank conclusions that practitioners reach based on their real-world observations of patients. While there are several possible reasons for this, one is that practitioners may overlook confounding variables that account for the results they attribute to the interventions in question.
Which choice completes the text with the most logical and precise word or phrase?
a. circumvent
b. corroborate
c. disseminate
d. implement
Letter B: corroborate
On May 10, 2015, there were 83 million Internet subscribers in Nigeria. The major Internet providers were MTN, Globacom, Airtel, Etisalat, and Visafone. By September 30, 2015, the number of Internet subscribers in Nigeria had increased to 97 million. If an Internet subscriber in Nigeria on September 30, 2015, is selected at random, the probability that the person selected was an MTN subscriber is 0.43. There were p million MTN subscribers in Nigeria on September 30, 2015. To the nearest integer, what is the value of p ?
What is 42
In the late nineteenth and early twentieth centuries, automobiles were commonly referred to as horseless carriages after the older technology they still resembled. Known as the Brass Era, this period in automotive design is remembered for its grandeur and artistry, its vehicles ______blank by collectors for their ornate detailing and gleaming brass fittings.
Which choice completes the text so that it conforms to the conventions of Standard English?
a. are highly prized
b. had been highly prized
c. highly prized
d. were highly prized
Letter C: highly prized