a farmer wants to plant trees around the outside boundaries of his rectangular field of dimensions 650 meters 780 meters each tree requires 5 meters

HESI A2

HESI A2 Quizlet Math

1. A farmer wants to plant trees around the outside boundaries of his rectangular field with dimensions of 650 meters × 780 meters. Each tree requires 5 meters of free space all around it from the stem. How many trees can he plant?

A. 572
B. 568
C. 286
D. 282

Correct answer: C

Rationale: To determine the number of trees, reduce the field dimensions by 10 meters (5 meters of space on each side). The effective area is 640 meters × 770 meters. Each tree occupies 10 meters × 10 meters. Dividing the effective area by the space for each tree gives: (640 × 770) ÷ (10 × 10) = 286 trees. Choice A, B, and D are incorrect because they do not consider the reduction in field dimensions and the space required for each tree.

2. Ventral refers to which part of the body?

A. Top
B. Bottom
C. Front
D. Back

Correct answer: C

Rationale: Ventral refers to the front part of the body or an organ. It is the opposite of dorsal, which refers to the back part. So, when describing the direction or location of an anatomical structure, ventral would mean towards the front. Therefore, the correct answer is 'Front.' Choices A, B, and D are incorrect because 'Top' refers to superior, 'Bottom' refers to inferior, and 'Back' refers to dorsal, not ventral.

3. During protein synthesis, what process uses an RNA strand to produce a complementary strand of DNA?

A. Transcription
B. Translation
C. Transfer synthesis
D. Codon synthesis

Correct answer: A

Rationale: The correct answer is 'Transcription.' During transcription, an RNA strand is used to produce a complementary strand of DNA. This process is essential for converting the genetic information stored in DNA into RNA. Choice B, 'Translation,' is incorrect as it involves the synthesis of proteins from mRNA. Choice C, 'Transfer synthesis,' is not a recognized term in molecular biology. Choice D, 'Codon synthesis,' is also incorrect as it does not refer to the process of using an RNA strand to produce a complementary DNA strand.

4. What charge do alpha radiation particles have?

A. -2
B. 0
C. +2
D. +1

Correct answer: C

Rationale: The correct answer is C: +2. Alpha radiation particles consist of two protons and two neutrons, giving them a net charge of +2. This positive charge is due to the presence of the two protons in the nucleus of the alpha particle. Choice A (-2) is incorrect as alpha particles have a positive charge. Choice B (0) is incorrect as alpha particles carry a charge. Choice D (+1) is incorrect as alpha particles have a higher positive charge due to the presence of two protons.

5. Which of the following pH values is most likely for lemon juice?

A. 3
B. 5
C. 7
D. 9

Correct answer: A

Rationale: Lemon juice is highly acidic with a pH around 2-3, making it more acidic than neutral substances. A pH of 5 is too high for lemon juice, indicating less acidity. Similarly, pH 7 is neutral, and pH 9 would be alkaline, which is not characteristic of lemon juice. Therefore, the correct answer is option A (pH 3).